The only person who has access to your data is the IT support consultant/s authorised to access your data for setup and support purposes.
The consultant is the one you meet during the scoping meeting.
Outside of that, if you have signed a services contract with DotActiv, it also includes the relevant space planners.
If the initial support consultant is busy when you need assistance, DotActiv assigns the work to the next available support consultant. While that consultant might not have been in the scoping meeting, they have the same authorisation by being part of the support consultant team.