Disgusted Makro strubensvalley customer

I purchased an Intellybox from makro strubensvalley, and granted the purchase was made the end of July. From the outset I noticed the speed of my programs was not great, but I assumed it was my fiber service provider. After many phone calls with firstly vumatel and then wirulink, we established it was in fact my intellybox that was the problem. I then paid an IT specialist to come and assess the item and attempt to remedy the situation. I was then informed that in fact the Intellybox was still registered to a previous owner, whose purchases are clearly marked prior to my date of purchase. More worryingly, some of the purchases made on the google play store are explicit ****ography, and I often have my nieces and family friends children visiting at our house, and while the adults are busy, the children make use of our Intellybox. I took the item back to Makro strubensvalley where I was met with such apathy I am disgusted. The manager would not even connect the machine so that I could prove to him, the Intellybox was in fact secondhand and still registered to another person. He flatly refused. Dear Makro, my girlfriend and I have been loyal customers for over 20 years. You can count on it not being 21