Shocking Service Finchoice

I have had an account with Finchoice for over a year now and generally my service from them has not been bad . However , of late , I have had several issues with them namely , my instalment wrongly reported to Credit Bureau thereby affecting my credit score , my Accounts show up on the app as in arrears . The USD facility shows I a limit available but when I try to access it , it says I must contact their Customer Care who cannot assist me with anything except getting me a statement. I asked to speak to a manager or some one who can answer my questions , it has been 2 weeks and I still await a satisfactory reply. The call centre agents although very oolite have very limited knowledge of what they are doing . I have really reached the end of my patience with these people . Can anyone help?