Wolf lawnmowers

I bought a Wolf Lawnmower Trimmer combo from Builders Express in May. The trimmer line feed had a fault. This was replaced Sunday 14th June only to find the line feed does not work. With all due respects Builders Express have been good but after sales service to sort an issue out is hell. Bring it in and we will have it repaired does not cut it. The machine has a design fault. Meantime the prices have gone up and to get a credit and buy something else is just not right.