Poor Quality and Service what happened to Sprint?

un explained charges, rebates not honored, new phones that constantly need replacing. What is going on with sprint. Never had these problems in the past 3 years know I have them constantly not just on one plan but two plans. That is 4 phones that have been replaced at least once in the first 3 months and two phones that had to be replaced in the first two months and 2 phones in 6 months. Do to shorting out or phone stucture. the Rumor is awful I have three that replaced the Katana II's that went bad twice. Know the Rumors have all started shutting off in the middle of a call or texting. The brand new LG I got the front screen has shorted out it's 6 weeks old. Know I get charges for internet and I don't have the internet. I am being told it is from picture mail that I pay unlimited use for. How do I have over $50.00 in charges for picture mail/internet. I have to fight with sprint non stop. What happened to the quality and service???