My response for these type of pause complaints will be the same, unless you can provide evidence of your accusation.
Please review UGL Rules
Allow your opponent 3 minutes of time for a pause break if requested.
In case of dispute, you will need proof. Type /time and screenshot when paused and unpaused to capture pause length.
Replays dont contain any pause information so this is the only way we can enforce this rule as of now.
Pausing is more based on the honor system unless you can provide screenshots of abuse. If we get many complaints of a single user abusing pauses then we can determine an action to take. Also, please reference a Match ID# with this complaint.