Lousy or rather non existent after sales service

I bought an iHealth blood pressure a few months back and after a few months the rechargable battery failed to the extent it would not take a reading despite being\fully charged\"' If plugged into the charger it worked so obviously it was the battery. I returned it to the store in original packaging but unfortunately did not have proof of purchase and because of this I offered to pay the cost of a new battery. This is when it got bizarre as I was told to take it back to the iPhone shop (presumably because it was called iHealth), eventually they decided to look into it themselves but 6 weeks later it was returned to me unrepaired and unreplaced. The manager Mark Kemp told me there was nothing they could do!! So I sit with an almost new BP monitor that does not work. I would appreciate a response before I go to the consumer Council"