Capitec Bank

I am really finding it difficult to understand as to why Capitec bank is taking almost eight weeks to resolve an issue.My account was debited for an amount of R850 from a company i never dealt with.I went into the bank and logged a complain***** almost eight weeks and nothing is been done.Everytime we phoned them they keep saying its still under investigation.How long does it take a bank to investigate and resolve an issue. They dont care about people ant they priorities anymore.I am very irritated and would consider changing my bank