Buying Gift Card Online To Purchase Items?

*They said i could refuse delivery or return it back and i would get credit back to my gift card and credt card in few days but the thing is i wouldnt be able to combine all the gift cards i have.
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You already have your answer. When you refuse delivery, the item will go back and you’ll be refunded in the same way you paid. In other words, if you used four $50 gift cards and some credit card amount, they’ll reauthorize each of the four $50 gift cards and the credit card amount and you’ll be right back where you started.

You could have avoided the whole problem by asking Walmart ahead of time about their gift card policies before you jumped in with both feet.

Take delivery and spend the remaining cards whenever you need anything. Hell, Walmark has toilet paper, for goodness sake.