Problems with new phone

<p>Two months ago I open a new contract. I recieved a Samsung J5 phone. After a week the phone starts typing by itself, go into apps, send messages by itself and freezes. I took it back to Cell C and they send it in for repairs, after 3 weeks I received it back, saying it was a software problem. After 2 days it starts again with the same problems. I took it back again and waits again for 3 weeks. I received it back on Saturday and from Monday the same problem exits. I phone Customer Service and now they want me to sent it in again for repairs. I have to pay for 2 months for a phone I don't have any use off. I rather have a new or other phone!!!!!</p>