Bad Customer Service

I stayed at Ithemba for a year.It was a wonderful staying with them,it felt like home.The bitter sweet came when I decided to give notice on the 10/09/2020 to leave at the end of November. I did it online got confirmation back that it was approved.End of November when I wanted to move out I was told by the security that my notice wasnt given to them.I printed a copy and give it to the security to give to the building manager but nobody came back to me.Soon after that I saw a new building manager.I stayed,pay the rent for the month,waited the whole of December for feedback or plan of action,none.On 28th December I told the security that I am leaving on month end.He told me the same story again,they dont know that I am moving out.He called the building manager to come and speak to me but the guy refuses to come down.I called the office the next day only to find out that the lady that captured and rep**** to me about my notice is not working there anymore and she hasn't capture my notice as if it was my problem.So I had to complete another notice, that will be seen as a late notice and that I will loose my deposito in the process and that the building manager is not going to allow me to go without a notice from the office.I mean really am I being kept hostage now??? I knew the building manager want going to stop me,he couldnt come down to talk about the matter,so I left end December,left my keys at the security.