We buy cars Midstream

I purchased a car with we buy cars in midstream On the 8th March 2023 I went to sign papers and the car got released ,the disc expired the 28th Feb 2023 ,21 days of grace are done ,I have emailed we buy cars tried calling no answer ,I then went as far as going to Germiston branch to get a permit ,and no permits available, I been ignored by emails I sent ,cops have pulled me over .I am beyond frustrated because I don't have answers