Unwarranted Increase in monthly bill

I purchased new pods because internet connect has been very inconsistent since I build my home. I had other pods from xfinity but agent told me I needed new pods. I purchased from the site as told and now my monthly bill has increased $50. No explanation and no adjustment in services.  Also, I am not under a contract yet as a customer for many, many years I am not able to get a better price yet my service is spotty and bill continues to rise.