Hisense oven failure

I have a Hisense microwave oven applience. After 3 years the coating inside the oven, under the rotating table started pealing off. Now the microwave has burnt a hole through the base of the oven rendering the oven dangerous. I do not expect structural failure to occur in a micro wave. As a pensioner, I now have to find money to replace the oven even though the microwave parts are still working.