IDP IELTS — No refund over Cancellation

I first booked my Exam date on 4 aug for test day 11 oct 2020. On 7 Oct they told me that my exam has been postponed to 13 Dec 2020. I preponed it to 27 nov 2020. Now again they post poned it to 3 Jan 2021! And asked me to prepone if to available date. I decided to cancel my exam but they are denying me my cancellation request and Refund. As per their rules I requested my cancellation 5 weeks prior the test date but still they are looting students money this way by denying refund!!! They are frauds who keep on changing test dates and ruin students career