Messed up my order

Superbalist got my order wrong and I logged an exchange, one of the items was refunded they didn’t bother informing me that it’s out of stock instead I had to call in. They make a mess and cover it up by offering a refund they sold my item to someone else and instead of finding a way to replace it they tell me I’ll be refunded. If I choose to purchase it again I’ll have to pay the full price as the sale has ended that’s how they treat customers it’s upsetting.