Dell ST 2220L - Trouble Starts after few month of purchase :(

Dear Sir/Madam,

I have very bad experience with DELL ST2220L Monitor.

I bought it on 30 April 2011, and It' developed variety of issue within few month of purchase.

I mail same on Sept-28-2011 (Monitor S/N: CN-0GP5YD-74261-09R-167L) to DELL and got SER No.300104977947 from DELL on 29th Sept. 2011

And got replacement model ST2220M (CN-ONN41N-74261-16N-04CM). (lower model) and again problem develop in that model also and on contact to dell got SER No:300104981777 for replacement.

This time I got ST2220L Monitor and now yesterday I found that this Develop WHITE PATCH and few small WHIT DOTS near to right hand side bezel.

I'm trying to search via my account with DELL to raise issue and found that THERE IS NO WARRANTY LEFT on my monitor, while as per BILL and DELL India WARRANTY, still 4 month LEFT.

I fade up with Dell India Site searching support email and also call to toll free number but NON OF OPTION I found suitable to my query and issue.

Finally I came here thinking somebody will hear (read) me and help me so can keep my faith intact in DELL products in future too.

Waiting for your reply,

TC