Very bad and disappointing experience with Stadio

Bad customer service, is number 1, when I app**** for PGCE I was allocated an advisor that failed to assist me with mere things like filling up forms as most of our communications was done via whatsapp, I then decided to de register and was told I would be forfeiting my app fee and registration fee, was then convinced to continue, I was then allocated someone else because I had complained about the first advisor, the second one assisted until I manage to get registered, this was on the 11th of March, in April I was contacted by someone they refer to as a buddy, this person was to assist with all the login credentials, everything was just too much and that time I was in between my shifts, when I asked her if it was too late for me to de register she confirmed with me that I was more than welcome to, she sent me the relevant people to send emails to which I did this was now on the 14th of April 2021. After I have sent emails not even one of the people I sent emails to responded, I then took it upon myself to call on the 21st of April, the lady that I spoke to told me that my request was in process, that they will communicate with me once everything is finalized, I waited until last week mid July when I received an email to say that I owed 25 500 something, I was shocked at the fact that I had done everything to communicate with them that I was deregistering, no communication non whatsoever, these people even after they confirmed my registration they never even sent me study materials nothing, now they are insisting that I need to pay 25 500 for the service I was never rendered and that was so poor. As I am writing this I am so frustrated because even the lady tgey refer to as my buddy confirmed their negligence and incompetence, to top it up she said it's a multiple students who have have the same problem as in I do. According to them the reasons I have to pay is because I only told them I was deregistering later than the 14 days they have put in their contract, but say I had to pay...we talking 25 500 of no service rendered, I never even submitted assignments or written exams as I was under the impression that everything was handled. Please I need help. My name is Kelebogile Masupha.