How can I get 100/200 $ voucher

Hi everyone,  

I gave my first Salesforce Certified Administrator on 9th march 2026,  but i was unable to clear it at that time now i want to retake the exam but now I do not have 100 $ to spend on the retake how can i get full waiver or how can I get 100 $ voucher/ 200 $ voucher (If i can give a new attempt)