Bad customer service

I had a data contract with Cell C for 12 months of which it expired and now runs on a month to month basis. Today I called in to ask why I didn't receive the normal benefits which I was getting the time the contract was in effect. To my surprise when the consultant (Oliver) explained that since the contract was now running on a month to month basis, I lost the promotional 3 gig night time surfer that came with the initial package . He told me that it's not the company's duty to manage my account, I had to call in and find out how I would lose out should I not upgrade the contract furthermore judging from the name of the contract I should know that the night time surfer was a bonus on the contract. I'm greatly disappointed on the level of service received more especially since they ask for you to rate the service.