Surname wrong on account and vodacom not fixing it

So some how my wife surname changed om her cellphone account without reason. We have since the 06/12/17 wrote 7 e-mails with don't know how many phone call sto the call centre with now results. All documentation have e mailed (copy of id as well as marriage certificate). She spoke to the call centre agent and she can see the documents have loaded but her surname is still wrong. I am definatly changing the account once it is up to a different provider as for sure this is unacceptable. Please vodacom correct all info ASAP.