Purchases & Refunds
The payment error is due to two reasons.
Reason 1: For credit / Debit cards the credentials added during transaction are incorrect.
Reason 2: For online transactions the credentials are correct?
You can only Redeem the coupon at the time of purchase. At the checkout page there is an option of Redeem coupon
At your account dashboard there is option for change display name. You can change by updating the name.
There is not option for canceling a purchase course. Plesa read our for the same.
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