Breach of company policy

I purchased a phone on the 26 of this month. Getting home I faced internet problems took it back to them. they also struggled to reset till I had to leave the phone behind for them to fix later on I went back to pick my phone I was told the problem was with net work. I took the phone but when I got home I faced the same problem but couldn't help going back the next day. Today when I took it back I was told Im not intitled to a refund or a swap. My question is whats the return policy and why are you misleading customers on purchase by printing something that does not apply? Kegomodiso the lady who help me after exchanging few words with her she said the only option for her was to take the phone for repairs which I agreed to at the end as I could not help keeping a phone not functioning. My problem is she said she has to take the phone today and I will get it monday late. that means the whole weekend Im phoneless and pick and pay is holding onto my money and phone. I feel not fairly treated as I even suggested they take it monday morning but there was no room for that. I feel like I no longer need it after the treatment I received from the sales lady