How to activate my purchased softwares (RCDC-US and Ram Connection) of perpetual licenses without the extra charges or wrong billing?

How to activate my purchased softwares (RCDC-US and Ram Connection) of perpetual licenses without the extra charges or wrong billing? The last time I did this on my own, it resulted to wrong billing. I have to stop using the software before the billing gets out of control. Issue came bout since 05-Feb-2019. This have created inconvenience and troubles for me.
I have tried numerous attempts to ask for assistance from bentley but the the same has continued to disappoint me. I am not happy at all with the service rendered to me despite me paying the maintenance fees that comes with it. I'm sorry but I have to vent out my frustration.