THETHA THETHA ?? Where are you??

I bought an airtime machine 14TH April 2018 from THETA THETA, I have correspondence from the 15th April that the machine does not work properly, and keeps saying error no stock. ongoing from that correspondence on the 18th,19th,26th, several telephone calls as well. when they would answer. then after not being able to use for a couple of days the 15th May with picture s of what the machine was showing in error. this carried on over the next week - until on the 1st I asked if I have been handled?? to that I recieved no reply. I also have documented correspondence with the Owner Chris, from 24th May to the 1st June and have tried to call every day from last week,. to no avail. I now have no recourse, but, to go public and see if anyone else out there has the same problem.