I went there to buy a shoe and tried to pay with a...

I went there to buy a shoe and tried to pay with a debit card. The machine said card declined when the man told me they do not accept debit or cash. I leave to find that I WAS CHARGED and they did not give me the shoe which I apparently purchased. I have been calling all throughout the day today for a total of 50 times and noone has answered me once. I will be coming by later on today to see what excuse they have come out with for the poor service.