Not sure I agree with anything much
I would say more like nothing needs calibration and it throws a tamper error error , I don't actually get it
If you mounted then the same way up and nothing has really changed the panel must be giving you a tamper error ?????
I assume if you didn't remove the sensor and only tried to change the battery yourself then it also throws a tamper error
If you were under a contract and having a service contract etc then this seems all fair
For that kind of money don't you have full app control
And doesn't the installer have app control ? Where he even as a one man band can disable the problematic sensor for you
Depending on what your paying each time you need to change installer aswell , someone who is more flexible and available
Ask system to be left as user reset it's not under a contract anyway so why wouldn't they?