Claim rejected and policy cancelled

<br> I took a policy with 1Life some few years ago.In 2013 I was admitted in hospital.As I was covered for accident death only I decided to request a full life cover on which I was told to do an HIV test. Having done that I was informed of the Dread disease cover.Early this year I started experiencing pains which resulted into major operations .In the meantime I could not work .I submitted a claim in May as I had no income and undergoing treatment. I was calling them every 4 weeks after 3 months of submitting my claim. Every time I was told a different story.One was that the consultant who was assigned to my claim had resigned and a new one was processing my claim,seemingly she had to start from scratch.I found that odd as she had said the claim was almost finalised. 3 months ago I got an email asking for medical records dating before 2008. that is 8 years ago, I gave them those.. Last week after numerous calls I received a decision letter stating that my claim has been rejected due to lack of full disclosure. What irks me is, for 7 months i was paying the premiums while unemployed. Why did they take so long to finalise the claim and continue drawing the premiums.I feel cheated