PAID but no product

Bought a product Last week ( April 11 2018 ) . Order number : MAK833364 . I bought online paid on the same day , now I have to pick it up they are telling me its out of order . I HAVE PAID ALREADY!!! I DONT WANT MY MONEY BACK I WANT THE PRODUCT BECAUSE IF IT WERE OUT OF STOCK I WOULDN'T HAVE BEEN ABLE TO CHECK OUT AND PAY AND GET THE ORDER NUMBER .