Text delivery can depend on a number of factors, location, phone connectivity to the network, outages, the sender or recipient being out of coverage.
So we can follow up on this please can you PM us details on this please -
Your number The number(s) that text you Date/time the text was sent and when it was delivered Where you and the sender were when the text was sent? Were all texts delayed or just Vodafone? Were you roaming at the time? Your phone make/model
We can then raise this with our Tech Support team to look into.