Dissatisfaction with Pep store

Good evening,I would like to state that in September I bought a phone (Mobi cell Beam) at Pep store Heidelberg.I was actually desperate because phone was in demand at my work place and since my personal phone was unpredictable I was forced to but a new phone with immediate effect.I was happy that I bought a phone but within a day or two the phone started malfunctioning.I was so committed in such way that I could not go back to the shop the same time to return the phone.Just after a week when I had few hours to make a turn in town,I went to Pep store and reported the phone.The lady checked my slip and told me that 7 days is past therefore I should bring the phone with the box so that they can take it for service.Good people,just because I had the phone for more than 7 days but less than 2week ,the shop policy stipulates that I cannot change the phone but take it in for Service. I'm Worried because the reason for me to go buy the phone in the first place was desperation because of work demand and now im being told to leave the phone for days to be serviced.I was actually in Heidelberg for work related matters and had to leave and go back to Pretoria.After few days I realised that I wasn't the only person complaining about Pep store with their phone that arnt in good standard.At this present moment I can't even use the phone receive calls bcs it will just ring but don't display anything on the screen,it's very slow and the phone isn't good at all. I'm Wondering how they manage to cell such ******* for customers bcs I'm not the only customer with such complain.I think I'm going to escalate the matter bcs I cannot loose money for buying *******.This matter need to be resolved as soon as possible before I escalate to my insurance company.my advice to Pep store is to take all phones identified by customers to be unserviceable and return them back to the manufacturer before loosing their customers.I would like the Shop to please return my money back due to their poor service rendered.