No feedback and lack of disclosure

i joined affinity health last year June specifically for the spectacles benefit. I was not informed then that once the benefit became due, which is a year after joining, that I could only get spectacles to the value of R150. I was appalled when I found this out 2 weeks ago. This being after a year of paying a premium of over R300 for 12 months. When I decided to cancel nobody called me back after specially requesting a manager to contact me telephonically and by email. How do I accept the loss of all that money and receiving no benefit from it. I had no joy being part of this scheme even after abiding by their ridiculous waiting period of 1 year.