The watch strap is not easy to break as it had gone through strict testing during the production. The strap can withstand quite heavy weighs and if there is no much force applied it should not dismantle that easily. As the warranty does not cover normal wear and tear, you may proceed to purchase a new pair of strap from the link below.
NOTE: DO NOT use any glue to fix the strap as it will cause damage to the watch and would not be able to attach the new strap. Example as below : -
Here is a quick guide to fix the watch strap below:-