Worst Nightmare experience

I did a database course with intec college and finished in April 2019 , l did pay all my fees on time and finished all my 3 assignments , but up to now l havent received my 3rd assignments marks, l do not have my certificate yet l have went to their cape town offices and phoned a countless times but no response just lies and worse of it they ruined my credit records, when l did my credit check when l wanted to apply for a contract l was told l was in arreas with intec. This is the worst college in SA