Bad Service

I used the incorrect reference when I made a payment, the first time I phoned the call centre in January, they said I need to send everything in an email and they'll sort it out, I then received a reply confirming that it was resolved. When the funds had still not been transferred to the correct account, I phoned again, this time speaking to a rude consultant who said the owner of the account has to phone. The owner of the account has phoned and gone to the branch, each time being told it's sorted out. It's a month later it still hasn't been done. I've sent numerous emails that are being ignored.