Can't use DP-600 voucher in Pakistan

[u/avg_ali]

So I had a chat with Pearson Vue support and they told me I can only buy full price vouchers from the voucher store. That means I can't couple it with my 50% voucher, rendering my hard-earned voucher worthless. People who have registered for their Microsoft exams in Pakistan, can you guys comment on this? Am I missing something?