Untrained staff and no service

I have upgraded on the 11th of April'15 and firstly the staff at the store indicated i will be able to keep my airtime...which was not true. What is more i have not received my data or minute bundle for about a month on my new contract and have phoned the call centre twice only to be informed they will raise the matter. My first call was on the 14th of May and I have not to date received any feedback and the problem has not been resolved (my ref nr. ***)