All suspended items, be it a product, service or a category, continue to remain in the system's database and is hidden from active items. If you need to recall the item, you simply have to reactivate it.
To reactivate a suspended service:
Step 1: Go to the Products tab and select Services.
Step 2: The Service list will appear. Tap Filter and then Suspended, then Apply.
Step 3: Locate the Service in question and change the Status to Active.
