Poor customer service: Membership incorrect but unwilling to assist in fixing it

I signed up for a national membership and after taking over a month to activate the membership correctly with my med aid discount, I now discover that, in spite of paying for the national membership, I only have access at the local gym where I signed up. They also continue phoning me to find out if I want to join, in spite of having joined months ago! And when I ask to have my membership sorted out they are not very willing to assist and correct their mistake!