A GiftCardMall gift card: the website says it cannot process the card, and the phone says the store did not activate it
On GiftCardMall, the website sentence is that the system is busy. The phone sentence is that activation was not finished at the point of sale, and the holder is sent back to the seller. A virtual card bought on Amazon can reach that phone sentence, and support then says there is no refund. Do not fold the two sentences into the single word inactive.
The website sentence is that the system is busy. The phone sentence sends the holder to the seller. The seller saying there is no refund is the next sentence after the phone, not the website sentence said another way.
The address on the card returns an unknown error
The card back prints a balance address, and opening it returns an unknown error. The phone number on the card speaks a different address, and that address is the one that can show the balance. Use the address the phone menu on that card speaks. It is not copied here.
The site reports a system error, and the call that got through used the number on the plastic
One complaint mixes three things: the activation page reports a system error, the number on the card has been worn off, and someone lost the balance after opening a site that was not printed on the card. The people who got through called the number on the plastic. Spare addresses pasted in the comments are not collected here.
Once the number is worn off, a spare address is not the one printed on the card. Opening a site that was not printed on the card is where a balance can disappear. This page keeps only the phone number on the plastic.