Vodafone voicemail hacking?

moty1984

Hi just a quick question thought this would be the best place to ask. I recieved a call today from number 08080600832 and diverted it to voicemail as I was busy.2mins later recieve a tx saying a attempt was made to access my voicemail andif it wasnt me then to contact vodafone asap. Now ive googled this number and it seems to be a vodafone number.has this happened to anyone else.the voda rep said it would be investigated but as soon as I told him the number he then said if its a marketing thing gone wrong it would be left. Why would marketing try and access my voicemail?

Any info please.