I paid for a call of duty black ops reserection pack 4 for Zombies and it said i have to...

Hi I spent 14.99 on a Zombies pack but it didn't give me the maps i reset my Xbox used the suggestion and it didn't do anything i even have proof of my purchase order but it said buy it again so im asking for it to be fixed all i want is the maps but if i can't get them i want a refund of my purchase that didn't give me what I paid for.

:)