Wedsite and whats app number not useful

I made a purchase online for a flight last yr ,which was for the comrades marathon. Due to covid i was given a voucher to use within 12 months. I sent them an email on the 5th January 2021 and still didn't receive feedback about cancelation. now i go online and it says i will not get a refund because its less that 45 days before it expires. I want my money back thats all ..