Incorrect debit and bad service and bad network

Rain is the worst Network Provider. I ordered 1 sim card from them. THEY DELIVERED 3 SIM CARDS. WHEN EMAILED TO QUERY WITH THEM WHY DID I RECEIVE 3 SIM CARDS. THEY DID NOT REPLY. EVENTUALLY THEY TOOK 3 WEEKS TO CALL ME BACK. THE AGENT DIDN'T KNOW WHY I RECEIVED 3 SIMS I MANAGED TO CANCEL THEIR 2 LINES AND THE AGENT SAID HE CAN ONLY SEE 1 ACTIVE LINE ON HIS SIDE. I PAID THE PRO RATA. ON THE 1 SEPTEMBER I RECEIVE A BILL FOR R750. 00. I MUST PAY 250.00 X 3. WHICH I REFUSED TO PAY. I AM NO ALL A SUDDEN GETTING SENT EMAILS THAT I'M IN ARREARS. WHEN YOU HAVE A QUERY THEY DON'T CALL YOU ON TIME BUT WHE YOU OWE THEM Then there is no problems with the call Centre. Half the time there is no network. So for me it's a waste of my money