Fly.Cool please terminate my contract with you.

I'm very disappointed by fly.cool, I have been trying to change my debit order date and update my banking details since last year and they told me that I need to contact them 2 days before my pay day or the date I want the debit order date to be. I have been doing that for months now and no one is responding to me, I have been sending them emails and chats on Instagram. I get paid on the 25th of the month and they told me the last time I had a chat with an agent that they have the 26th instead of the 25th which I did not mind but every time I send them a message from the 24th of each month no one is responding to me. Now I have to make a manual payment every 1st of each month which is really frustrating. I would like to terminate my contract with you guys, I have never ever received such poor service as this, they don't even deserve 1 star. Please terminate it please, I will move to other service providers.