Mobicell dissapoints all the time

Good day

I bought my 2rd mobicell on the 26th of march. this one was a tablet. I bought it at eastrand mall at PEP store, boksburg, south africa. my first one was a V1 wich stopped detecting the sim card and i could only use it via wifi connection. then it stopped charging as my battery exploded. i then bought the tablet and just under 3 months it no longer charges. it stays on 7% the whole day. I did send Mobicell a message on instagram and no one responded to me. I gave the company the benefit of the doubt and bought the same brand. two off my collegues had the same problem with their phones (mobicell) phone not detecting the sim card and it stopped charging. I called PEP to inform them of my troubles and was told if i do not have a slip they can not help me. i have the box and everything. so i will now have to be stucked with a phone that does not work and spend more money that i do not have. I am currently charging the phone and it is down to 5% from 7% and i am not even using it. I would like to be compensated for this inconvenience. I am highly disappointed at the quality of this phone.