Regent Business School shocking service

I recently contact RBS to cancel a course I registered for due my work/travel availability and there were clashes with my schedule. Enquired on the 23rd Jul and was sent the relevant documents to complete. Requested documents were completed and sent on the 28th Jul. I was then advised it’s a 30 day process to cancel. On the 28th Aug, refund form was submitted. I was then advised it’s a 14 day refund process. On the 9th Sept, I emailed RBS to the Accounts Department to enquire if refund will be this week. I was then advised that the amount on the refund form is incorrect, please bear in mind that the amount was confirmed by accounts team prior to form completion. I amended the amount and sent it through. Now I have been advised my refund is 25th Sep. They keep moving the dates, secondly it was their error as they confirm all was in order with the form when it was sent through. If I didn’t query on the 9th Sept, this will still be sitting in their inbox. I am highly disappointed in the communication as well as feedback from Regent Business school. Considering this form was sent on 28th Aug, the refund should have been completed by 10th Sept. This is unacceptable!