Was Promised 45$ Off and ended up getting only 10$!!

I'm a new customer at Xfinity. A couple of weeks back I got registered for its internet services, upon registering for it, I was told by one of the Xfinity Store representative that if I add my mobile services to my plan then there would be an automatic reduction of 45$ on my internet bills irrespective of my Data Plan. So out of 60$, my total monthly bill would 60$ - 45$ and further then would be an additional 5$ discount of putting it up on the auto-pay and hence my total bill would be 10$, and hence to get that scheme, I immediately got my lines transferred from The T - Mobile to Xfinity immediately thinking that would benefit me in getting more discounts. Also to get this scheme I had to immediately purchase a new mobile device as there are quite limitations With the compatibility of the devices with Xfinity, but I was happy going that too just for the discounts. But unfortunately upon finalizing every thing and then reflecting on the monthly payments, I got to know that only 10$ would be deducted from my mobile services. And upon calling up the customer care representative from Xfinity, I was told that this offer was only applicable to the ones who have unlimited data plan but I was not told that before when I was acquiring the mobile deals. I'm totally dissatisfied with all these inconvenience. As the new customers, we should have been clarified all these things earlier as now when everything has been finalized, and the bills have come over to be paid, it is difficult for us to cipe how oth the amounts as we are new to this country too and are just settling!! We did not expect this kind of service from Xfinity!! I humbly request the concerned authority to kindly look up to this matter and process the applicable discounts which I was promised at the time of enrollment. I can only afford paying 10$ for my internet services and because of that I chose to sign up for the mobile services as that would help me pull my bills lower to this amount but I did not at all expect that would not help instead would require me to pay more bills eventually.