WebAfrica Double Payment - No explanation

I switched from LTE to fibre with WebAfrica. They have processed the debit order for both LTE and Fibre and I cannot get an explanation for the double payment. They keep on asking me to send a bank statement to prove the double payment. I send the transaction details from FNB and WebAfrica does not accept it. They keep on saying they need to see the bank statements. But cannot give me an email address where I can send it to. The agent says he cannot do anything. So irritating.