CALL CENTRE AGENT ***********

2 months ago i received an sms to say my contract is due for an upgrade , contacted 084 143 on 18/05/2015 at 09:04am call lasted for 4mins:25seconds was advised since my contract ends in July they cant put a notice of termination i should call in June since it expires in July.On the 17th June i called at 15:32 call lasted for 4mins:46 seconds and the lady i spoke to advised she then can put the month's notice to terminate the contract. 16 July i call as i wanted to confirm the termination of the contract and was advised i will get an sms , an sms came through to say it will expire on ***5 to my suprise as i made the call in June, please pull my phone records and sort this out.This is simply a PRINCIPLE issue, i took time to phone in June to sort this out and it was not done, when i spoke to the call centre agents yesterday i was told since i dont have the reference number they cannot assist , check my call records and and find the proof there.It could be a small amount of money yes but that is bad service from the agent who helped me.All i want is to have this contract moved to prepaid please.Im done paying for it.