Cannot do my internet banking

I am not pleased with absa, I actually don't what is wrong, today I tried to do my internet banking and all my transactions gets blocked I get a message on the screen which says there is a sim swap done on my number and when I call Vodacom and confirm with them they cannot see any sim swap done on my cellphone number , absa is telling me that the only time I receive such error message is when there is a sim swap done , the system picks it up automatically and block my transactions, so now who am I suppose to blame between absa and Vodacom since no one knows what happening, this thing is really irritating me because I don't know if maybe there is a ********** acts happening or not. Absa please assist me since your system is detecting a sim swap made on my number which Vodacom cannot detect.