Love Beal And Nixon PC plantiff's request for admissions and interrogatories and requests for production oklahoma city, Oklahoma

Love, Beal and Nixon is trying to sue me on a very old credit card debt. I received a summons from them and answered it stating that I was requesting more information. They didnt send me anything except the last social security numbers on the account and the original creditors date. I believe this debt is past the SOL but I am not positive. How do I find out? I need to make them prove they even own this debt and provide the original contract. But I just received a plantiff's request for admissions and interrogatories and requests for production of documents. My 30 days is almost up (even though I thought the law was 35 days) I need to fill this out ASAP but have no clue what to put. I know they are trying to get me to admit guilt without providing me the documents they know they are suppose to provide. I think this is their standard business. What should I do next?

please help fast!