Over payment re fund, and my statement

I have arranged payments with MFC the previous lady responsible for my account was very helpful and understanding i had payment problems just for one month i called and explain to her and she understood then i was able to continue with my payments. This year early my account was handled by another lady Silindile very every rude from no where i got a letter of demand but i was payment as per agreement. But that was sorted.

Now am done with my payments all that i want is my statement so that i can have an overview of how i was paying and according to my own calculations from the old statement that i got my account is over paid.i want my statement because i want to be sure before i can claim for any refund. Slindile now is not responding to my quiry.

She was very quick to send me letter of demand now that i want my refund and a letter stating that i am done paying shes not responding i donot understand what is her problem real because honestly the previous lady ( forgot her name) knew what customer service was. All that i need from MFC is my statement, letter stating that am done paying them, my refund and for them to cancel the stop order deduction. Other than the new lady ( Slindile) responsible for my account am happy with MFC