Would you be willing to answer a few brief questions about PlayStation Forums?
If I bought a psn card that did not get activated do I have to take it to the same store I bought I from.
Yes, you have to. Take the PSN card along with the receipt! I'm sure you shouldn't have a problem since the receipt will say you bought it and will match the product code.
bookpride has it spot on ONE_SHOT.
You should not have any issues, if the problem is indeed a case of the card simply not being activated.
Let us know how it turns out.
Welcome to the PlayStation Community Forum.