No shipment refund for wrong product

I ordered Bioharmony Advanced Saw Palmetto Compex from iHeal, because of the three ingredients it contains. Their suppliers didn't have stock. I asked for a refund. They kept delaying the refund, saying that stock was expected soon. Two months later plain Saw Palmetto was delivered, which I could have bought everywhere and cheaper. I returned it. iHeal doesn't want to refund the cost of shipment.