bad service on reparing a sony

i bought a sony experia fone may 2014 and within a month it started to drop cals , at first it was aparantly the sim cards fualt , then it was the updates , now after sending it in for the 4th time i am stil waiting for iet to be repaired correctly , when do vodacom make the call and fone a client back , why do we have to ceep doing the fallowing up , i dont want to be a vodacom cutomer annymore , either i want my fone correctly repaired or replace it for me<br> job number ***1<br> job number ***1<br> <br> thanks <br> jacob greyling