Hi saravyoung,
Welcome to the community and thank you for posting.
I am very sorry to hear you are experiencing issues with your roaming service whilst in Tenerife.
Apart from this issue, I do hope your holiday is going well.
When you landed, did you receive a text from ourselves to confirm the roaming service was activated?
Is this impacting all services including texting and roaming? Have you popped your phone in to airplane mode and then back out?
If not, can you please try this and see if there is any connection made?
Thanks,
Nat