Shoppers Anonymous Inc. Cashier Check for $4998 DON'T CASH!!! I'm in big trouble for it!! Wagner South Dakota

I got a letter unmarked with a cashier check with it for $4998. I was not thinking that anything bad could happen to me. Well I was wrong I cashed the check and did what they told me to do. I call the bank number on the check they said it would clear well they were wrong I am sitting on a $4998 that I have to come up with to pay my bank I have tried calling them back and all they do is hung up on my. I should of looked on the net to find out what it was but I was not thinking. I hate that I never did anything to find more about them out.

they had me do tasks like the following:
wal-mart purchase of $50.00
JcPenny $40.00
MoneyGram of $2873.00 and also one for $1579.00

The letter is signed by a Jack A. Dill

I could be losing everything of mine like my car and all my things and I am only 19 and a college student and I don't know what to do. If anyone could help me please do so. I could use everything you have.

Don't be like me and cash that check.

Jade
Rudd, Iowa
U.S.A.