Tappan Range Exploding

Tappan range

I have a Tappan gas stove that has exploded on us three times in eight years. I cannot get in touch with Tappan, get routed to three different companies including: Poulan, Electrolux and Frigidare! I can't believe this.

My former stove lasted 18 years. We replaced the alleged safety valve twice at cost of $200 each and today there was a FIRE in the oven caused by an explosion of gas. Where do I go with this issue????