Vitality drive Active Reward

Dear Sir / Madam

I earned a Vitality drive Active Reward and was told to redeem this by the 24th of January. I tried to redeem this yesterday and call the call centre. Sue informed me that there was no reward which I found strange. I did mention that from the Monday my husband became the primary driver and we change the type of insurance. She then told me that is the reason why I lost the reward. I find this strange as if you award something and it is still within its validity period it doesn't make sense to cancel it. She then likened this to a cell phone contract however I informed that that it I was entitle to the benefit and still have the contact I should still have the award. She then told me to read the Ts and Cs. I don't think that it is fair to cancel an award that I was entitled to if I changed the primary driver and trying to redeem this within the validity period.