Horrible customer service

Deposit money on 9 May at branch in Parow Centre and discover teller made mistake with reference number.Been in and out of bank to correct it,but still no luck until now.Because account belong to VFS and busy with my Visa docs, reference number needs to be correct.Even ask them to send email to VFS and explain situation,but that also to much to ask.Sad part is a deposit slip with all correct details was given to teller and yet feels like mistake was mine.Call and write emails but still waiting for matter to be resolve.