Why call? I send a note to my CC company with a complaint and, while watching TV, send a Facebook review on the company website with the details clearly laid out. I might also send an email to the travel review sites if really mad. (note I also send complimentary reviews to the same).
I called companies a couple of times and never got anyone that could take care of the problem or got bad customer service at that end. My brother recently got ahold of Taco Bell's company site due to a unfilled credit card paid for order. Of course they told him they automatically took care of it. NOT. Dispute that charge. Then if feeling charitable, call them or not.
Note that charges can come thru on your phone bills. From $1 and up. I got one of these unauthorized charges and my phone company tried to get me to take care of it with the internet company making the charge. I made such a fuss, because they could not provice me ANY documentation of the charge, that they took it off. Found out this has happened to millions. Congress allowed the pass thru.
It is a lot like a dog that bites people. If no one ever notifies the authorities, the dog keeps biting and the problem expanding. Eventually, someone in authority says "but no one ever complained."