Pathetic service

I made a settlement towards my loan a week ago. 29th Jan. I have bee calling their call centre everyday since to check if the payment has been received and updated but each and every person I speak to cannot seem to help. I told them the payment was done at the branch and did not have a proof of payment. I asked them to check for the payment on their statement and they said they cant. I eventually managed to obtain a proof of payment from the person who did the payment on my behalf and I sent it to through to them twice on Friday 2nd February. I called then again today 5th February and they conveniently have not received both emails sent. The service is the worst I have seen EVER in my entire 32 years of existence. Pathetic to say the least