Standard Bank - Moving Backwards in all aspects

I had a credit card with Standard Bank which was settled in June 2017 after endless headache. Long and short is I made a settlement payment which took them two weeks to allocate hence costing me further interest charges eventaully after much debate I paid the additional interest charges and spoke to a manager at Standard Bank to help close of the card so that I could rid myself of Standard Bank. Its virtually impossible to rid yourself of debt with them. They use every tactic possible to manipulate clients to stay on even drumming up false charges and delaying the process. Guess what. I get a letter in the post this week stating that I owe them an amount +- R100 after almost a year. Apparently various calls were placed to me to which I have not been the recipient of one call nor email prior to this letter. Absolutely disgusted with Standard Bank. Never ever again!!!! I will also now be moving my bond.