Its vodafone marketing

I got a missed call from this number at 7.30am, but left no message.

they keep calling me, but leave no msg, if its someone who wanted to contact me the could leave 1

I would like to identify the caller

who has called me from this number.

I have had about 10 calls from this number above and am sick of it!!!  They never leave a message either, so it is very suss.   I know no one in the 07 area.   I don't carry this phone with me, but see the number come up when I check for messages.   Is it a telemarketing company / vodafone perhaps?   The calls come in at all times of the day.   If it is Vodafone then they are a nuisance.  I'm changing the number soon because of it.