Bad Service with Samsung S4 Phone

I am a client of vodacom for 6 years I have 6 contracts So when i got my Samsung S4 Last year Vodacom said that i will get two extra screens if it breaks So Few months later i broke the screen They replaced it So two weeks back the phone fell and the screen cracked again I took it to Vodacom Loch Logan Bloemfontein where i explained to the person and they said they will repair it After 5 days i went in to find out where the phone is They told me they are waiting for the part A week later i phoned them again They now told me that they Quoted me for the repair I must pay first for the repairs This is not right At the beginning Vodacom said i am getting two screens When i took it in the person also said i get two screens Now two weeks later i still do not have the phone Fixed or broken This is very Bad because i use the phone a lot for my business