Whirlpool India — Oven not working properly

Address:	Chennithala house, Perunna, Changanacherry
Website:	Whirlpool

My oven was showing complaints through the warranty period itself. Service was there and they resolved it, replacing the transformer. Almost two weeks later it showed the same error and they requested to take my oven to the service centre and I 've done it. Now they are saying that it is the complaint with the board. How can I use the oven again without expecting another error in weeks. I bought this with so much expectations and the experience was so bad.