Signed up for a Diploma course and they changed it halfway without notification

Disgusted with College SA we signed up to do a diploma in Events management. At the end of the course, received a plain certificate. When querying this, they told me they changed their course and diplomas are for accredited institutions. So clearly they were never accredited but made out they were. They are spammers and unprofessional. You do not get what you paid for It is a ******* and A WASTE OF MONEY !!! Would NOT recommend them! At no point were we ever informed that they decided to change the course