HyperionDev customer service is poor

I regret not checking hello Peter before spending so much on their course. The marking system is *****. The course is split up into 3 levels for software engineering. Level 1 went well because they would grade me properly by giving me the exact score I got for the task, that is between 0-100%. Level 2 and 3 started getting reviews unaccompanied by marks. I logged more than 5 incidents complaining about this but no change. A few times, they took a week to 2 to mark my work and they did they wouldn't allocate a mark. I am not at the end of my course and spent days asking for a mark of the pending 1 task. Instead, they went silent and keep advertising for course extension. It gives me the impression that the delay is on purpose. I don't have my certificate, I have a passing average of +80% and 100% work done but 1 task not marked. I wasted my hard earned money and will definitely be telling all my friends about the experience on and offline. I'm disappointed and feel ******.