At least 6 wks to repair item under 2 mths old

A Ryobi petrol trimmer we bought in January 2016 had to be returned as it was not working. Game said it would be repaired and if not returned within 3 weeks would be replaced. It was exactly 3 weeks to the day that we were notified it was ready for collection. My husband collected it but as it was raining could not cut the grass. Today he attempted to use it only to find it was still not working and so we assume was not repaired. My husband went back to Game and asked for it to be replaced or get his money refunded. He was told that it is company policy that it must break 3 times before it can be replaced and that he must wait a further 3 weeks for a repair. He argued that it was now going to be 6 weeks as it was not repaired the first time, but they refused to listen. So far it will be 6 weeks with no grass cutter and the grass is growing by the day. We now have had to pay someone to come in and cut our grass. We do not find this a fair or even reasonable practice.