Bundle Discount Never Applied After Adding Xfinity Mobile Service (4 Unlimited Lines) to Xfinity Internet Service

As an Xfinity Internet customer, I recently added 4 lines of Xfinity Unlimited Mobile service.   The Xfinity website indicated this bundle would come with a discount, and, several times on the phone I was told by Xfinity representatives that this bundle would come with a discount.  One representative told me that 4 unlimited lines would give me a discount of $40 per month.  I have not yet received this discount.  Last month, I was told that it would take a little while for the discount to be applied because I had recently added the Xfinity Mobile service.  Now, after several weeks, I called in to ask about the discount and was bounced from department to department to department.  The 3rd representative to which I spoke told me that the discount was never applied to my account as it should have been, AND, he told me that he could not apply it "because sometimes it's available to apply and sometimes it's not."

Is there anyone able to assist me in getting the Xfinity Internet/Xfinity Mobile bundle discount?

Thank you.