https://mikrotik.com/supportMikroTik product support service
Most of your questions are answered and explained in RouterOS documentation.
If you have bought a RouterOS license or a hardware product, limited support service might be provided through our support system. Contact your distributor for help and support, if device is not directly purchased from MikroTik.
You can hire a certified consultant for full configuration support, network design and other diagnostics.
Check our community forum.