Overcharged by Makro - AGAIN!!!!

On 05.01.23 I purchased good on special at Makro Carnival. When I got home I saw that even though I had bought 4 of the same items only 2 where charged at the special price. I contacted Makro Carnival telephonically and asked to speak to a manager as this is the third time the same thing has happened. I was asked what it was about and when I said an overcharge and for the 3rd time I was told no one was available to take my call. I was then extremely irrate as I do not believe that "no one" was available. I was asked for my telephone number (thats all - no name) and told someone would call me back. I am still waiting. Such bad customer relations!!! They obviously think that they do not need the business of the small customer.