Poor service from FNB

My bank for years has just shown me that they just "don't care" about me.i wonder how many more clients have they treated like this,their consultant on Monday told me I have a debt commitment with them for 1519 rand which I dnt knw of,this happened after I made a credit card application,I straightaway told the consultant that I don't have any debt with FNB,that must be an error,he said he will escalate the matter and a more senior person will call me,today I emailed them,they never responded,but on Monday when I emailed them about a credit card application,hardly a minute a consultant cald being in a jovial mood,because they knew they were gonna make money from me. I'm disappointed in the Bank,and my only option is to join Tyme bank,they seem to care about clients.