Dishonest assistance

Intec does not reply to mails, they might reply to a complaint only. I called their call centre last week Wednesday 09 may 2018 to cancel my exam registration and was informed by the agent that I was in time and he would send a mail to the admin department and confirm with on Friday 11 may 2018. No call received on Friday, only an SMS confirming registration, I called today Monday 14 May 2018 and was told I cannot cancel unless I have a valid reason for it. Once this course is completed I will not register with Intec again and and I will not recommend to friends. Sadly this I have registered with them before and had no problems but it only takes one.