Buy legit Microsoft Keys
Link - https://reapershop.com/
They support MasterCard, Maestro, PayU Money, PayTM, Visa, American Express payment methods.
I bought two Windows 7 keys and it worked perfectly. There maybe a slight delay in receiving the key but you will get it.
If you have any experience with them then do share it in the comment box.https://reapershop.com/