Mondo mobile

Mondo mobile called me and advise that Vodacom has a free upgrade of data from 3gig to 5gig with no extra cost on my bill. when I recived this delivery note ,the next day went to Vodacom customer service. they advised there is nothing free , you signed up 24mth contact ********** immediately I contacted Mondo mobile advised the consultant the I want to cancel this and it is within 7 days also please arrange for collection. at point in time I was told all is sorted. The was collected 25 days later and I was debited for the month. on the1/11/ - I spoke to another consultant who advised that I will receive a call wI think 48hrs to sort out the query and refund. to date it's 72hrs had call. tried calling today twice call was cut. not a good experience. thinking of cancelling all my Vadocom accounts.