Bad service

On the 31/08/2017 & 01/09/2017 payments were made amounting to R534.35 and a proof of payment was faxed through to ********** 983. Firstly the so called Palesa Oliphant gave me a wrong ref no: HP372886 which was used for both payments. Few days later someone called and said they did not receive the payments I should resend the fax which I did. Still they did not receive it, not sure why coz I used the same fax number they gave me. A day later I got a call which threatened me that I'll be taken to court if I don't pay?. Some Ms Thembeka Mthethwa called and also gave a bad attitude and gave me a what's up number and the proof of payment was sent. How many times must this proof of payment be sent and when are they going to get it right at Hammond Pole? Why is this my problem while a payment was made?