MRS BPO, L.L.C. Debt Collection Complaint

MRS BPO, L.L.C. Debt collection department,

Other (phone, health club, etc.) Cont'd attempts collect debt not owed Debt was paid California

I received a letter dated -/-/15 from MRS BPO, L.L.C located at 1930 - - - -, NJ -. Stating that they are collecting on be half of - - - in the amount of $100.00. And if I did not pay w/in 30 days the info would be place on my credit report. Indeed I did own - - - earlier last year for a Modem, which I returned later and when I spoke with time warned I was told by their representative that my account was at a $0.00 balance after receiving the modem. And the negative info was removed from my credit report. Upon receipt of this collection notice I call time warner @ - and I spoke with a gentleman by the name of -, regarding account ending in -, who also states that my account is at a $0.00. I advised him of MRS attempting to collect $100.00 on behalf of -. I request for something in wring and per -, at -, I should receive a letter within 4-5 business days as proof that I do not owe - - any Money.