Option trade uk credit account

The reason I ask is that I am 64 years of age on an interest only mortgage of ?100. 000 that has to be paid in the next 6years or I will be in danger of losing my property if it is not paid or I find myself in the scenario of being unable to sell my property. I took the loan out 8 years ago but due to unforseen health problems I am unable to do any physical work.