UPS Delivery Rescheduled

Good morning folks

I am having a slight issue with UPS and/or Amazon at the moment. I’ve sent two packages to fulfilment centres at Rugeley and Coventry and I have two ‘Delivery Rescheduled’ notices on my tracking. Neither give any info on when the item will be delivered to Amazon - they are both at UPS in Tamworth.

Can anyone shed any light on this? Is it a problem with UPS or are they acting on Amazon’s instructions?

Thanks in advance, hope you have a great day!

Lynsey