Please help!

my phone is an unlocked S22 ultra 5G that I use with Verizon.

2 years ago, I went to Canada, used a diff phone on verizon and roaming worked

a few months ago i used s22 ultra 5g phone with verizon and i am able to get calls and texts but no internet. it actually shows that it connects to a network (rogers) and that I get 4G LTE but I cannot get online

a few weeks ago I go to mexico and the same thing occurs. it connects to network, i can receive text and call but no internet

hours on the phone with verizon and samsung customer service while I am in mexico trying everything from restart to resetting network settings, you name it, nothing works

Samsung told me to take the phone to a local shop, the shop said they can't do anything.

samsung then tells me to send the phone by mail. I have little hope this would help. 

has anyone experience anything like this? 

BTW the samsung support is an echo chamber so this is my last hope.