Very bad service

On the 17th August I went to Steers Albermale the one inside Total garage to buy food for my son. i paid with my debit card and they gave me food i forgot to take my card and realised at the other filling station that my card was not in my wallet nor was it in my handbag. Immediately i phoned the garage and spoke to the lady who was assisting me. She told me that they are looking for me as the card has declined. I checked my smses and got the sms for that transaction. it was R89.30. I phoned her again to tell her that the transaction has gone through on my side because i received an sms from the bank. I told the lady by the name Senzeni that i am going to come the next day and i will show her the sms. she said she is going to leave my card with the manager by the name kayleb. The next day i went to the shop,asked for kayleb. He came and i showed him an sms from the bank. He said to me but the sms says reserved funds. I said to him yes it says that if you swipe your card but the money is not available to me it's on reserved funds. It's out of my account. He did not want to listen to me. I explained that i am working for the bank i know what i am talking about. He insisted that i get a bank statement which i told him it's not going to reflect on the bank statement until it's cleared which takes 3 to 4 days. he said to me then you are not getting your card until then. I askes him to bring a calculator so that we can both calculate the balance i had before i swiped the card and after. He refused, trying to play smart with me, treating me like a ***** infront of the other customers that he will not do that which i also lost my temper because he was refusing to even listen to me telling me i am not getting the card. whenever i go back to him he would jump and say "DO NOT TALK TO ME WHAT DO YOU WANT" I had to involve the police to get my card. I asked why other stores do not keep our cards when we swipe because the money sits on reserved funds. I was treated like a *****. he has no customer service, full of himself, he think he knows everything when he knows nothing. they must get training on customer service and how the debit cards works.