Mis-information on cell phone contract expiration

My Telkom mobile contract came to an end on the 17/12/2015. I was on a smart plan 100 contract where I received 100 any network minutes and 5 gigs of data /month. I was not informed that if I do not migrate to a month to month contract after the expiration of my two year contract that I would be billed for the \promotional add on internet bundle"at a cost of R349.00 which was free for the duration of my contract. I went to two Telkom stores to query what would happen after my contract had expired and both Telkom consultants confirmed to me that I would be automatically migrated to a month to month contract. Neither of these consultants told me that I would have to fill out forms to confirm the migration. This shows a lack of training by Telkom to its staff. This information was withheld from me and was also not included in the contract documents. My bill for January is R630.99 with pro rata costs from December. Not informing me about the way forward after my contract expired was totally ***********"