TRS Recovery Services - firstdata.com Harrassing me Nationwide

I am getting telephone calls all hours of the day and night. My caller ID shows unknown name and inknown number. I supposedly have this blocked but they get through anyway. They wouldn't say anything the first 10 or 12 calls. Finally someone came on with a very heavy accent. He said I had a bad check to Wal Mart for $77.
I told him I was unaware of this and to call back in a couple hours when my wife got off work. They called back about 23 times in the last two weeks and never said anything else. My wife's mother died a little while ago and this is really bothering my wife.

We do not have an outstanding check. We hardly write checks anymore. Most everything we buy is on a credit card.

Weasel
Natchez, Mississippi
U.S.A.