I Paid Off Debt in Full But Lawyer Says I Owe More!

by julia
(TEXAS)

I had a bill from a dr. it went default and an attorney was put on my back to collect, he even summoned me to court which I failed to appear to... However I made contact with the lawyer and started paying off my debt. I paid off the $1200 that was owed, my last check I wrote paid in full.. and even asked for a receit but I never heard back and thought that I was left alone. This was in 3/2011 ... I recieved a letter today asking for another $1200... I have all but one check stubs to proove that I paid back everything. The attorney is telling me my information is wrong and to check again... I am in total shock and at loss at what to do. I feel like he is just milking me for money and taking advantage of me. Please help!!!!
I paid off EVERYTHING how can I deal with this without giving him more money?
He has sent me a statement in the middle of my repayment showing my progress (that I requested specifically so I can make sure that both of us are keeping correct track) and I made sure to mark each time I sent payment and how much so this would not happen... yet here it is.