Nextcloud expert in Kigali / Rwanda

Hello everyone,
as simple as that, i have 3 nextcloud accounts, one is professionnal and i face some issue of synchronising and maintenance;
i need to see someone in front of me and doing it;
the system is there but need to be cleaned a bit;
Nextcloud 16.0.1 - installed on infomaniak server - about 30 users
Thanks
Yannick