selling me ****

Good day, so i bought a sony M2 aqua about 2 weeks ago. within 7 days i returned the phone on and out of box failure (OBF) and had to wait 7 days for a REPLACEMENT. No problem got a new one and had it for a week and once again the phone is faulty and took it in AND NOW I MUST WAIT another 7 days. Clearly there is something wrong with these phones and they are going to tell me when the 7 days are up they are going to give me a new M2 aqua again. this 7 day period is total **** and i dont want to have the same phone again as i now know the problems it has. 7 days is ridiculous really. I need my phone and what will happen to my data i had bought as it expires and vodacom does not give a **** about it. i need a reply as i am not willing to wait 7 days and i dont want another sony M2 aqua, replace with similar or better model please!!!