Wonga, what a disappointment .

Extremely Bad company, very sorry I ever got involved with them. Debit order was supposed to go of on 25 April but for some reason my bank blocked it. I realized this on 26th because I checked myself, no notification was send from Wonga. I then did an instant EFT payment on the 26th. On the 29th I got 4 missed calls from Wonga and a SMS message saying my account has been handed over to their lawyers. I checked my account and it shows fine, the payment has gone through and I am not in arears. I send a email to Wonga collections and customer service asking them what is going on and attached the proof of payment. I also send a screenshot of my account not showing in arears. Nobody answered my email so I phoned them. A woman on the phone said she saw my mail and asked me to send her proof of payment. I asked whether she is an idiot, If you are looking at the mail the POP is attached, also look at the account , it doesn't show any arears. Yet on 30 April I got called multiple times by Wonga collections stating my account is in arears and they need proof of payment. I took this loan not because I needed the money. I have been through sequestration and have been rehabilitated, I am trying to build my credit record, but instead of building it, getting involved with this company has just destroyed it. Stay away from this place at all costs.