My number is being used by porn Spammers

For the past 2 days, I have been bombarded with hostile people who are replying to spam texts that I haven't sent. All are from phone numbers associated with att.net email addresses. Calling the Cricket customer service number is not helpful. They keep telling me to download Hiya, but that is not a solution to someone else cloning my number. They said, "Well you can change your number." I have had this phone number 20 years and I refuse to give it up just because Cricket can't put an end to what is obviously a security flaw in THEIR system. They also told me that the newer phones they are selling are less likely to have this problem. This, in itself, tells me why they have no incentive to fix this problem. I really have no alternative but to leave them and go back to Verizon Wireless. I'm sick of 20 texts a day that are cursing at me for something Cricket won't help me with.

Is anyone else experiencing this problem? Is there any solution? And DO NOT tell me to download Hiya or change my number. That is NOT a solution to this problem.