Disappointing Service and Lack of Communication

I have been with Sills Academy for some time now and paid for my course upfront. When I submitted an assignment for my 2nd to last subject I was told my account has expired and I will not receive my results. This came as a surprise as I had no notice etc that it was due to expire...the expiry date on my invoice was also incorrect. I was thankfully granted an additional 3 months which I am grateful for but how will this help...I submitted my assignment on the 16th March and have still not received results. I have sent numerous emails requesting the results but nothing - not even an email in return. I have also been told I cannot receive my last subjects books (which I paid for) until I have submitted all my assignments for my current subject. I have another 8 subjects that I still want to complete and that my company will be funding but will most definitely not be making use of Skills Academy again - will rather spend my money elsewhere if this is how they treat their students.