Broken Stove

I purchased a stove from Lewis in October 2014...Beginning December 2014 the oven door broke and I reported it immediately to Lewis and they promised to come pick it up for repairs. I had to go t o the store a number of times before they came to pick up the stove. The stove was with them for quiet a while and I deciced to pick it up as I needed to use while they were still looking for spares. The stove is still with me and there is no feedback from them even though i visit the store often for feedback. I just want a new stove or a full refund. The consumer protection act clearly states that I have a right to demand a new stove or full refund within six months of purchase and the oven door broke within 3months of ownership.