Levy Account in credit but membership is suspended.!

I have been a Flexiclub member for over 20 years. I recently as far back as 5 years realized that I have been forfeiting my points and levy accounts credits due to unavailability of suitable accommodation. In some years, I had huge levy credit balances but was still required to pay in levy fees based on estimate amounts for the new year. This in turn further increased my levy account credit that I could not use and later forfeited it in 3 years time. I have since reviewed their Rules and found that I can cancel annual payment of these estimated levy fees as I have a credit balance, but Flex club administration team have insisted on incorrectly applying their Rules and have instead suspended my account with available points and credit balance in my levy account. How can I owe them any money when my levy account is in credit? I have sent them endless emails querying this and have not received a reply from anyone in management except the unwarranted suspension of my membership. They also have the audacity to charge interest on this purported outstanding levy but my credit levy account does not receive any interest. I am totally baffled by their business practice.