No after sale service

We are renting solar from GoSolr and took and additional battery. The 2nd battery is not functioning as it supposed. They sent a "technician" out who simply just hit the reset button after puzzling for 20min on what to do. The battery is off for days then comes on with the alarm light flashing.

GoSolr has not sent anyone out again nor do they respond to emails but yet I am obliged to pay monthly for defective equipment. I am sure to get a call for from the lawyers when I stop the payment.