Failed to secure a booking

Hello Peter, I have just made an attempt to secure a booking for a bus ticket with the bus company and I could not be assisted due to a company policy. In January this year I cancelled a reservation and I was advised that I will not be refunded my money but I can make another reservation in future within 6 months of cancellation. Today I wanted to make a booking using my money that the company is holding and I was told by a consultant that I cannot make the booking unless I pay for it using my card then I can be refunded my money that they have. I was told that this is company policy and it cannot change, why would I have to use more money to be refunded of what is due to me as a customer? Why am I not allowed to use the credit that I have with the bus company without having to go through all the trouble? I feel ****** and being held ransom, this is an unfair business practice that is not ethical at all. All along I was thinking that I can use the credit that was held at anytime but now I am being given yet another story that is not matching what I was initially told when I made the cancellation. I am starting to think that Greyhound might NOT be the courier of choice after all and they are not necessarily what they claim to be when it comes to customer service. I am really upset about this and I want to use my money. Can you please assist me in getting to the bottom of this and have it resolved because I really refuse to be told that I need to spend more money to be refunded my money, this is ridiculous and unheard of.