Verified Student - Xfinity Chat Quoted $50 1 Gig Student Plan But Can't Apply It

I'm an existing Xfinity Internet customer of approximately two years. My current 1 Gig promotion is expiring and my rate is increasing.
I completed Xfinity's SheerID student verification successfully and received confirmation that my student status was approved.
Today, an Xfinity chat representative specifically told me that with the student discount, 1 Gig would cost $50/month. However, when I follow the verified student link and sign into my existing account, the student pricing does not appear.
The chat was then transferred to another representative who said residential billing cannot see my SheerID verification and initially told me I had to visit a retail store. Later in the same conversation, I was told the student discount can only be applied when setting up a new Internet plan and cannot be applied to an existing customer's account. The last time I went to a retail store was on the advice of customer support in regards to a billing issue. When I went to the retail store they told me that they could not help me. 
I have the complete chat transcript and SheerID confirmation. Before I decide to take my business elsewhere, could an Xfinity Digital Care representative please review this and apply the $50 1 GB promotion to my existing account?