These guys are frauds. I bought a bluetooth AFR+SM...

These guys are frauds. I bought a bluetooth AFR+SM-PRO+oil-temp sensors (more or less 500$) and it simply works whenever it wants. Most of the times you cannot connect the bluetooth with your phone. Sometimes it freezes and you have to restart both car and mobile device.
I have sent twice inquires to support center without any response. obviously because they don't know how to fix this.
Google App have not been updated for years now, even though customers are complaining.
On top of that when i complained in their facebook page for all the above the blocked me and erased my comments.