Issue with Xfinity Mobile Honoring Promotion

I have received no less than four email promotions at xfinity@emails.xfinity.com for an xfinity mobile line for a year included with my internet service as a previous ACP customer. With this in mind, I contacted both the xfinity store as well as customer reps, who promised me that the promotion was valid. I signed up for the service, but the promotion never applied. Called into customer service and had a support ticket made for the promotion to be added. Called again 2 weeks later when the promotion still has not been added only to find out that the ticket was never made and that the promotion never existed. Tried to email the promotion or send pictures of the email, but apparently, there’s no way for xfinity to receive emails or pictures? Was promised a callback with a supervisor who could help on 2 separate occasions and they never called back. I ended up porting out the line this month because it has been ridiculous how little the customer reps cared and they had no issues with transferring me over to different departments who were also not able to help. 

Now, I currently have the previous month’s bill with the full charges and need assistance clearing the costs as stated in the email promotion, or I’ll likely have to make a credit card dispute as my last resort. I’ve been on the line with no less than 8 different customer reps who have not been able to help, so hoping this time is different.