BAD CUSTOMER SERVICE, REALLY SUCKS...........

Rentoza's customer service is really bad, I have a subscription with them and I am having issues with my devices, I have tried contacting them via whatsapp to get help I was told the problem was escalated and I would get an email to say what the next steps are. I have been waiting over a month now for this email, I have sent emails whatsapp's and getting not respone from them. But once it comes time to make payment they will be in a hurry to contact people to get their money, I need these devices to work properly and seems Rentoza is not interested they sent me defective devices and now are not interested in fixing the problem, so maybe I won't be interested in making a payment seeing as to their customers are not important.