I had a similar experience. Not expecting anything from socalled professional bodies. Time for a “rogue” register.
I think we should all make the effort to Post this issue on as many discussion sites as possible.
We could also write to our MP’s about this dreadful situation where we are being help to ransom and ripped off.
Just called NICEIC to check on the 3 year v 5 year validity thing. They said that as the cert only has 2 very minor ‘C3’ ratings which are recommendations only and nothing that causes concern or may cause concern in the near future then the retest period should be 5 years. It can be less at the electrician’s discretion but there must be a sound reason for this. The fact that the property is tenanted carries zero weight. I will speak to my electrician and hopefully he will concede and change my certificate otherwise NICEIC said that I can raise a complaint. They are drafting an email that I can show to the electrician to ‘educate’ him.
That gives me a bit more confidence in the system.