Sprint Screw billing up when closing account EL Dorado Hills,California 95762-9023 Nationwide

After being with Sprint for almost 20 years I was having problems calling my wife when I was in the bedroom and she was in the den. It would take over two hours to receive it.  Sprint work over one and half years with all sorts of fixes that didn’t correct the problem. I kept telling them that if they did not fix the problem I was going to go with some other carrier. 

Got fed up and finally did it two months before my contract ended. Turned the sprint phones in two days later at local store and got receipt and in two days they sent me a bill for $569.98 which included price of phones. They went ahead and charge me for them as it appears that until it's received by the warehouse and checked out you're going to pay for them as they don’t trust the store to check them.  So I called and talked to a young lady technician and she told me that when I turn the phones in and they were received that “I would owe them nothing bill would be paid in full” and I have this recorded. then I give it a few days and call back to see if the phones have been returned and they still hadn't been returned and the gentlemen I talk to then told me the same thing and recorded also told me “I would owe them nothing” so two technicians told me I wouldn't know him anything after the phones were returned it all by Bill would be erased and I would not owe a penny. then I received another bill in the mail toward the end of March that said I owed $130.98 and that it would be past due on April 13th which showed the March bill balance is being zero. so my bill went from $569.98 in Feb to zero in March and then 2 Days Later I get a demand letter stating that if I don't pay $130.98 by April 18th they will exercise their right two take the money out of whatever method we had used to pay our bill in the past so this really confuse me. 

I call them was transferred twice and put on hold almost one hour and 45 min. Asked them how can they do that when they haven't even met the date that is supposed to be past due (April 13) but now on (March 31) I've already got this you will pay or else letter. I don't understand it but evidently they think it's fair to just send out letters that make no sense at all. I don't understand it and I think it's unfair so I really don't know what to do I do the best I could for Sprint for the better part of 20 years. Payed on time always also got them quite a few customers probably over fifty.  Now I got to go back and tell these friends that Sprint really does suck and they screw their customers.