CELL C!!!

So i had a contract upgrade and following the rules of my contract I went for the upgrade. The store assistant explained that the new contract would only kick in once my old contract expired. only to find out that the store manager made a mistake and caused my new contract to kick in immediately, when approached about it she politely said people make mistakes. This to me showed that she was unprofessional and also now that we have to pay an extra amount of money. With her \mistake"she also caused that i lost 3 gigs of data and caused my open line contract to run over resulting in more money without my knowledge"