Boost Mobile www.boostmobile.com Defective, Expensive Phones with no REFUND! Internet

I have a very DEFECTIVE Samsung Galaxy S2.
I have complained and complained to you and Samsung to no avail.
Samsung claims since the phone is still under the warranty and was
purchased from Boost Mobile, that I should take it back to them YOU and have them YOU refund my money.
I talked with a representative named John whom I think is a floor
manager and he agreed to issue a 50% off coupon for my next purchase a boost mobile phone which will expire in 30days so I better make up my mind fast. I asked him if he could extend the expiration date on the coupon and he claimed that he could not.
Ten months ago I paid about $350.00 for this failure of a phone, and now I have to pay $200 to buy another old phone by Samsung Galaxy S3. It means in ten months I have paid $550.00 plus accessories for an outdated phone.
I have been looking into other no contract companies such as yours, who offer the latest models of most manufacturers and the service and coverage is about the same as yours if not better.
I would like for you to reconsider this decision and upgrade me to a
Galaxy S3 with no additional cost to me.
If I purchase a Galaxy S3 from you, it will be my 3rd Samsung phone that I have purchased from you in the span of 18 months.
There?s something wrong with this picture. I keep buying these JUNKY
PHONES hoping for one of them to be good. First one was a Samsung
Prevail, 2nd one Galaxy S2 and now I feel I need to remedy my
non-functioning phone by buying another one.
This is not fair to your customers and does not look good on your track records.
I will be posting my complaint in the public forum.  As I have seen on
the net so far, no one has ANYTHING GOOD TO SAY about the Samsung Galaxy S2s that were sold to the customers by the Boost Mobile.
I patiently await your response and hopefully your positive cooperation.