Try dialing *#*#4636#*#* and see if the SMSC is configured properly. You may be to press Refresh on the SMSC field to see what it is. If it's not +353894300000",145 then try setting it to that. Enter that and hit Update.
Note that data has nothing to do with SMS text messaging.
To contact 48 support see the link in my signature below or email them at firstname.lastname@example.org
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- if the Chat Now option does not appear on that page then keep trying until it does.