Bad service and no update of payment on account

I'm normally very happy when using Wonga, but this month I've paid my account electronically and the debit order went through. On their statement and my account only the electronic payment shows. I've emailed them more then once and called them twice. First they told me to give 24 hours, but five days later nothing has change or being updated. When I called again the excuse is that they are having technical issues. Received no response on any of emails as well. This is bad customer service