I am using this platform https://delyva.com/my to book couriers depending on my customer's location as courier performances are different depending on their location.

So far, I like how I can choose my own courier, and they will pickup my package which is convenient. Maybe you guys can try.

Of course la there are issues that are beyond their control when the problem came from the courier themself.

This is just a way for me to minimize the issue from couriers