Stop spam calls

Saying they were O2 got in a real argument with him saying he was not O2 or O2 promotions as their number is different and asked did he have any morales for scamming people. Asked for him to give me my name but refused only asking if I was the account owner and to prove he was real he would send me 2 texts. He has my number so easy for him to text using O2 change over, however O2 have cottoned on to this type of scam and put warnings on their texts now didn't get to him texting just when he as