Plesk 12.5 Migration Stuck

I was doing my migration from old server to new server, it was running smooth. I transfers 300 Subscriptions with minimum warnings. but from last 36 hours my migration process is stuck I was migrating 16 subscriptions, 14 accounts with maximum 10 GB of them. i have checked the log in PMM/rsessions and restore-results says it's success all the 16 subscriptions. but it still stuck on 3%.

how can i fix it or cancel it?

Please help.