Poor client service

My car has been written off, my insurance paid up the balance of the car and I have proof of that. MFC consultant was also included in the email. I received an sms from MFC that my account with them is closed. But have been contacting their legal department since Monday after a proof of payment was send, the consultant (metlyn - ********** 117) is not picking up office line. I was also given the number of the team leader (ntombifuthi Sibeko - ********** 248) she is also not picking up. I just need a paid up letter to apply for a car finance for my new car, but no one is able to assist me with the procedure. Each time I am send to numbers that are not picked up. Can someone get back to me and give me direction.