Hello everyone, sorry to bother you

I have a problem with the razer gold pon so I bought two razer gold pin one of 50 and the other of 10 to be able to buy CUs on pubg mobile through the midasbuy site but when I insert the serial number and the pin code I get this message "The origin region of the PIN is not supported by the merchant. Please try with other PIN" when I have already bought with this method before.

Thank you for being able to help me