Over charging

I have also been getting over charged. Only it started since I first signed up I had asked for unlimited internet because I only stream and they told us they did that and we trusted them only to find out 8 months later because my husband broke his leg and we had to look at all of our bills they didn't sign us up for that they did something completely different and made it so we paid 100 extra each month for internet. Than when we called they said they fixed it well come to find out like a month n half ago they did not fix it and still have been charging us the extra 100. Have been talking to them on n off for the last month n a half to 2 months one person blamed us for not signing something. Like how am I supposed to know I have to sign something you guys never said anything we didn't know that. You guys as the company have to let the customer know that. Well we finally got to someone that was going to help us get our money back for all of the overage fees he made a receipt for it n send it over Well someone called us like 3 days ago saying we can't give you your full refund but we can give you a 300$ credit. That's 700 off of what you guys owe me. So we told her ok just do it and figured we will just call later. Well my service got shut off because she didn't add that 300$ credit n told us we told her we didn't want it. So had to call then again today n was on the phone from 8am-12pm becauee they kept hanging up on us n would send us to multiple different people that kept saying ill send you to someone that could help. Well finally got to a person that said her manager isnt in until monday but she put in 2 receipts for our issue. Im Hoping i actually get my money back. After i got off the phone i went on my bill only to see they are still charging me a extra 100 even with me having unlimited. See why am I paying for unlimited but you guys are still able to charge me 10$/50 gb. Tell me how that makes sence. I shouldnt be paying extra when i paying for unlimited internet. Unlimited mean unlimited not oh after so much im charhing you more. We have had nothing but problem with them and I will not be recommending them to anyone. I'm a pay check to pay check family I have 2 kids under 4 n im a stay at home mom my husband is they only one that works n the past 2 years he broke his leg was out of work for 6 months went back to work just to have something fall on his head gave him a really bad concussion and has been out of work for another 2 mknths so far so I don't have the money to pay you guys extra for something I didn't even ask for or for something I shouldn't be getting charged for.