Start with the lightest
If you just want to slow the pace, a short time-out blocking login for days or weeks and stopping marketing notifications is enough, and it lifts automatically afterwards.
When you need a longer break
Self-exclusion is a more decisive option that closes access for a longer period; request it from the responsible-gaming settings or via support, and confirm it to start at once.
A practical tip
Delete the Mostbet app from your phone during the period, as keeping the icon out of sight reduces unintended returns.