Seventh Avenue No such account- but they say "Past Due Balances." 1112 7th Avenue Wisconsin

 My Mother made a purchse from a Seventh Avenue catalog for a pair of boots for $200. She mailed a check, received the boots a couple weeks later and loved them. Three weeks later she receives a bill in the mail from Seventh Avenue saying she has a "past due balance" of $20. Before I knew it she mailed them a check for $20. One month later (now) they sent her a second bill saying she now owes $41 and it is "past due." I tried to call the customer service department line but they are closed on weekends. I'm going to call again on Monday. This is absolutely appalling and innocent people who don't understand the reality of identity theft, such as my Mother, are too easy a target for companies that utilize these evil tactics. The account number I had to punch in when the prompt first popped up said she had a $600 credit limit! She doesn't even have an account with them! This is a clear scam and after researching other reviews of similar problems with this company I fear my Mother's identity and finaces could be in danger of being compromised.