Bicycle that Has falling off paddles.

I bought two bicycles and when I opened them in Christmas, one bicycle had no paddles and I returned on the 26th December and I was told they we're sold out and I could not afford a more expensive one and they put paddles. The same day paddles were coming off and I fixed them and they kept on coming back until I decided to take it back and asked for my money. I was told I couldn't get my money back due to return policy that I was not made aware off when I bought the bicycle. I was just told to keep my receipt. They called the supplier who said they will come and asses the bicycle when they come to Bloemfontein and they will come back to me. I went there on the 11th January and till date I haven't received a call. Store On the customer repair copy HC03 number 0393 not even constant numbers. Their numbers appearing on the receipt though is ***.