Yoco Customer support is ****. Not helping and just telling lies.

Trying to get a card machine to work I have to call every week for them to fix the card machine I have a couple of Card machine but non of them is giving me an issue like this one. They keep on giving me lies about the problem.

When you ask the support team to speak to a supervisor they say that the customer can not speak to them. they have to log a call back. Its now again a week and no supervisor has returned my call.

The longer you take to provide me with a working device the longer I lose money and if I lose money you lose money.

What should I do regarding your bad customer service? and nonworking card machine?