Hey there and welcome to Apple Support Communities Harry_hkr,
We can certainly understand your concern and can help provide some insight.
We recommend checking out these steps on what to do if you have issues making a FaceTime call.
" If you can't make or receive a FaceTime call on your iPhone or iPad
You need a cellular or Wi-Fi connection to use FaceTime on your iPhone or iPad. Otherwise, you might have issues for one of these reasons.
Check whether a FaceTime feature is available
Update your FaceTime settings after you set up a new device
If you experience issues with receiving a FaceTime call after set up, update your device with the following steps:
- Update your device to the latest version of iOS or iPadOS if needed.
- In the Settings app, tap Cellular. Make sure that your phone line turned on. If you use multiple SIMs, make sure that the phone number you want to use is selected and turned on.
- In the Settings app, tap FaceTime. Turn FaceTime off and then back on.
- Tap the phone number that you want to use with FaceTime.
If you have issues with Messages after you set up a new device, you can also update your Messages settings."
For additional information, check out this link: If you can't make or receive a FaceTime call on your iPhone or iPad - Apple Support
These steps will help ensure your device is working with ease and can fix common issues like the ones you’re experiencing.
Kindest regards!