Hi there,
Stay off the phone - you need proof of what's said so keep it in writing only. Also, you'll rarely hear anything that's of use to you.
Re the call to Hull, the Manager there would LOVE you to pay them £100+ as that's more than they'd ever get from Harlands. However, I suggest you do not have to pay that much - at least not yet.
Sorry but the £9.99 applied to the other CAG case. Whatever you paid per month, that is what you'll offer to pay Harlands.
Send your letter to Harlands, not the Hull gym. I've amended slightly about the T&C's which everyone knows about,