Very unprofessional !!! I am allowed to say NO !!!

I am usually not the type of person who will complain on a public platform, but what I just experienced was shocking. I was contacted by one of the Vodacom consultants regarding the benefits I can receive on my contracts. I was informed that I can get a wireless ****le and 2G data, but this will increase the monthly amount I need to pay. I gave the consultant time to explain as I understand that it is his job. I told the consultant that I am currently unable to increase my monthly installment due to financial reasons. The consultant kept trying to convince me, and I kept on saying that it really isn't possible for me at this stage. The consultant would not let up, and it truly felt like he was forcing me to accept this offer. He then had the audacity to ask me that if my husband made me dinner and it wasn't something that I liked if I would also tell him that I wasn't interested. This was a ridiculous question to ask! He was basically implying that I was throwing the offer back in his face. I am truly upset about this as it was the most ridiculous call ever! I was grateful for your offer, but I, as your customer, am allowed to say no!!