Sanlam Gap Cover warning

I took out GAP cover with Sanlam a few years ago. I have not yet used their services so I cannot report on that element of the business. What has happened, however, is that I just noticed that Sanlam dropped their premiums from R350 to R200 at the beginning of the year. Here is the catch. They didn't just drop them - they sent an email to inform one of this - which landed in Spam. So now I have been paying R150 too much for the last 10 months... and that is supposed to be OK? I wrote to them to clear this up on 11 September and received no response.... really disappointed.