Account not updated after 7 days

My husband have paid up his wonga loan on the 3r August @08h15 in the morning today is the 9th August and still not updated we have phoned and was told it takes 72 hours we paid it via that Instant payment with Ozow now they want to blame Ozow I have contact Ozow and they send me proof that the account was paid on the very same day so I don't know why is wonga doing this, there service is starting to getting very BAD I would not advise people to do early settlement because you will have a problem. I'm waiting for them to try and debit his account. I have send numerous emails with both myself and Ozow proof of payment and still nothing has been done or response from Wonga. BAD BAD SERVICE WILL LOOK FOR ANOTHER SERVICE PROVIDER they just lost one happy customer.