Bad service

My son purchased a mobile phone for me. New series Samsung J1. on 2015-04-21. I went back on the 24/5th to complain about no or erratic wifi signal. The did some settings, and sent me on my way. On 01-05-2015, i went back, they told me that there was nothing they could do, except send the phone away, leaving me without my phone and not able to use my communication method which is whatsapp. i said that i wanted a new phone, with no problems. their response was that it was more than 7 days. i informed them that i had complained previously, but they were not interested. I spoke to the manager, who is Eben Pieterse.<br> It is ridiculous that a new phone should give problems like this, even after QC.