If you are receiving spam text messages or calls on any network you can stop these by texting 7726, state the number that has texted or called you and this will conclude this series.
If this does not fix your issue please contact us at support@ice-comms.co.uk or 0333 202 5000 option 1 for Customer Services then option 1 for Mobiles and we can raise this with the network and attempt to help you where possible.