Summons from Midland

I received a summons from Midland but I have no idea who are those guys! I do have some debts but not with them, I need to respond to this summons asap and I have no idea how can anyone help please??

This is the letter I received when I was not home they left this with my brother and I was out of the country at the time.

THE STATE OF ARIZONA to the above-named Defendant,xxxxx;.
I. A lawsuit has been filed against you.

II. If you do not want a Judgment taken against you for the relief demanded in the accompanying Complaint, you must file a Response in writing in the Office of the Clerk of the Maricopa -manistee Justice Court, accompanied by the necessary filing fee. A copy ofthe Response must also be mailed to the Plaintiffs Attorney, whose name and address appears above.

III. The Response must be filed within TWENTY DAYS , exclusive of the date of service, if served within the State of Arizona, or within THIRTY DAYS, exclusive of the date of service, if served outside the State of Arizona.

Plaintiff, through undersigned counsel alleges as follows:

1. Plaintiff is a Kansas corporation. I

2. Defendant(s) (is are) (husband and wife and) (a)
resident(s) of Maricopa County.

3. This Court has subject matter and personal jurisdiction.

4. All pertinent acts and omissions giving rise to this lawsuit occurred in Maricopa County, Arizona

5. All conditions precedent to Plaintiffs right of recovery have occurred

6. By accepting and using an offered credit card, Defendant(s) entered into a credit card agreement and agreed to the applicable terms and conditions of that credit card (the "Debt"), Plaintiff is the servicing agent for the present successor-in-interest (“Holder”) of the original issuer of the credit card

7. Defendant is in default under the terms of debt. The present amount owed under the terms of debt, after all setoffs, is $899.11. This amount includes the principal balance of $693.38, plus interest from the day of default, May 12 2006, until the date of this complaint at the debt interest rate of ten 0/100 (percent) per year minus any payments made.

8. Despite demand to do so, defendant has failed to pay the amount owed. Plaintiff has accelerated the amount owed under the terms of debt.

9. The acts and omissions of defendant constitute a breach of contract. The Holder has been damaged thereby.

10. Plaintiff cause of actions arises out of contract. Pursuant to the terms of the debt and ARS 12-341.01, Plaintiff is entitled to an award of reasonable attorney’s fee and costs.

WHEREFORE, Plaintiff prays as follows:

1. Judgment against Defendant in the sum of the principal balance of $693.38 plus interest at the rate of 10% per year from the date of default, May 12 2006, until paid minus any payments made. The amount owed at the time of filling this complaint is $899.11.

2. For an award of attorney’s fees in a fair and reasonable amount to be determined in the discretion of the court with more particularity at the time of trial, and in the lesser sum of the amount allowed by applicable law or the suggested amount of $242.76;

3. For Cost incurred herein; and

4. For such other and further relief as the court deems just and proper

Ok, so it looks like the summon is on Maricopa County and I don't even live there, and the letter was dropped at my house in a different county and to my little brother.

What should I do? I'll appreciate your help!