Lack of customer service s****s

I have been a member for two years. I recently received a letter of demand for non payment for the month of June. I sent through proof of payment. When i queried this, I was told by the owner that it is a generic email sent and if I have a problem I should not train there anymore. I then found out that he gave my training partner a discount on the very same package that I took. When I requested reasons as to why some clients get preferential treatment, I was told it was an admin error and once again told I should not train there anymore. I cancelled my contract after having been told not to train there anymore and I was thereafter sent an invoice for payment of the balance of a contract that I never signed. A copy of an unsigned contract was sent to me, informing me that I am bound to the terms and conditions contained in it. This owner is a bully and has a serious lack of customer service s****s. He tries to enforce contracts upon clients and for those who have no legal knowledge are probably forced to honour them. He does not care about you as a client, just the money he can ****** from you.