bad service from foschini

I paid my full outstanding amount on the 28th of April. In June I got an sms stating my account is in arears with R50.. I gave instruction end of April whan the balance was paid,to close the account.. Today (21Aug) I got a sms stating that my account was handed over. I phoned customer care beginning of the week so they can escalate and investogate. When I phoned them now (on the 21st of Aug) nothing was still not done. I have been struggling for the last 2 months to sort this out. They never waited for any payments but can't deliver service when needed..