poor service and unreliable device

The card device that we have received has been unreliable and as a small business there is nothing worse that not being able to take cards for payment. Calling the callcenter is a lengthy affair(I have now been holding for 20 minutes to speak to a consultant) and now on more than one occasion the agent was rude and you could hardly hear the instructions. On our last paper order they with out consulting us sent a whole box(probably enough to last 2 years) and debited our account with a massif amount for the paper.