Repeated scam calls on cell phone?

As of yesterday, about every 10 minutes there are text messages coming through with the same message stating "Call xyz at number this is in reguards to GECU @mail.com. You ar eto call this lady etc. I don't know how this person got the number of the cell and why this call keeps coming 24/7. I can't block the issue. How do I get rid of this and why did this happen. I call the Credit Union of GECU and they have a recording stating there is a scam linked with their name, but they don't let you know what to do. I just have a basic cell, but would like to block text. T-Mobile