App not responding at all

<p>I will never pay a cent until I can log unto your app or way better PLEASE send your people to come remove this device. I have called you before and it worked maybe three times. Its clear I won't be able to track my car should it get ******. Fix this thing and I will pay TODAY. All the username and password is incorrect. Your system created it all NOW I can't log in. Sort this mess asap or come remove it before friday. I will get another company. You will cancell the contract cos you can't deliver what your sales consultant promised me. </p>