Useless App!!!

I joined dial direct thinking the experience would be a good one. Your app worked for a month and trips started invalidating. I contacted dial direct and sent the stuff to the onlinesupport email and no response. I upgraded the app and it went back to good tracking and validating trips, once again after a month trips started invalidating again. I contacted the call centre who told me i have an incorrect version and had to complain on the google store app that there was no updated version. This lady then contacted me and said the version is fine and told me my GPS signal is disconnecting and do i keep the services on, i said they always on, not an excuse! Today, this very rude and unhelpful guy phones and tells me its only my app he works with apps all the time. Listen guys, dont ever tell clients nonsense like that, without us there would be no dial direct, your app is the problem and your app must be fixed!!! Stop giving excuses, its the version, what phone make do you have. If you have customers your app should function properly on any type of phone. And stop making like you doing us such big favours when all you doing is phoning with the same excuses and not actually helping the situation, just frustrating clients even mpre. FIX YOUR APP YOU HAVE LOTS OF COMPLAINTS ABOUT IT, ITS NOT THE CUSTOMER, ITS YOUR APP!!!