Long time customer ready to jump ship!

Received a call from xfinity telling me my 3 boxes were soon to be obsolete so they were sending me updated ones. I received and installed new boxes. Now I was never told that I needed to return the old and I repeat obsolete boxes. I have auto pay set up so I didn't realize right away that I was being charged for not only the 3 new boxes but also the 3 OBSOLETE  boxes! I con/scarf customer service and they explained that in order for me to be refunded the amount I was charged I would need to return the old boxes and then give a call back. Now I work 7days a wk and when I get out the nearest xfinity location is closed. From hearing horror stories from others on sending the boxes back in the mail I didn't feel comfortably doing so. I finnally returned the boxes on a day off and contacted xfinity once the return was complete. I started in the chat and ended up reexplaining my frustrations on a voice call 3 times. Only to be offered forst $20 then $30 of the $210 I was charged and was expected to receive back from the prior customer service call. No one ever made mention that there was a time and or refund limit on these [Edited: "Inflammatory"]. I could understand if I terminated service and xfinity was waiting for my boxes to be used for another client but I will say it again....I was told these boxes would be NO GOOD and unusable!!! Why do I have to speak to multiple reps and barely get anywhere...mind you one rep aven said I get your frustrations especially for obsolete equipment! Policy policy policy was everyone's excuse....well the typical customer does not know the fine lines of the policy and was not told that they would be penalized for having extra unusable [Edited: "Language"]!!! Please make it make sence!!! On top of that even if it is a policy....exceptions cannot be made for a long time customer? This is how we treat paying customers of a service that will undoubtedly keep raising costs? I asked a few ppl if I was crazy and or over reacting to be told...this is why we told you to drop xfinity years ago. I was told I would be called by a manager today....Still no call....once again terrible customer service! If I don't get the credit back to my account that I should I will be looking for other alternatives as well as making it loudly known how xfinity treats their loyal customers.