Repairs on Ryobi Generator

Good Day I bought a Ryobi Generator in may 2017, we only start using the generator roundabout August. Few days later it did not start, the rope broke and we took it back to builders for repairs ***. We paid R 1500.00 when we collect the generator....few days later the string broke again, battery was not charging and now it is requested to pay R2400 again. I have experience worker that knows how to use a generator, as per Craig from Ryobi we do not know how to use the generator. I can now remember that when we purchased the item, there was one that came from repairs on the floor and was been sold. don't know why we took the same one, just lots of problems with this generator. Amanda and my husband told Craig that we have to finish our contract and we now have to pay penalties, we send in the generator 06/11/2017 and we had to call to find out is it is already repaired. Craig feels that we have to pay to get the generator....I am absolutely not happy