My tax credits NHS Exemption certificate expired several months ago. I had no idea, it's been sat in a drawer. I thought I had a valid one but apparently my income has crept up over the threshold for qualifying for one and so I simply don't have one. I claimed for one free eye test and two lots of dental treatment, I really thought i qualified. Nobody told me I didn't and I was not asked to show my certificate again so it stayed in the drawer.
Yesterday I got a fine in the post for the first lot of dental treatment. After a few phone calls to the certificate people and tax credits I realised this was totally my fault for not knowing the certificate had expired, (In my defence I received the certificate at a very difficult time, partner had just left us and I'd just started claiming benefits).
My question is who can I phone to try and prevent fines arriving for the sight test and some more recent dental treatment? I'm waiting for the Dentist manager to ring me back, if ringing the practice doesn't work who else can I try?