Why dell Support is not good at warranty update or Extension of product

Hi Team, 

Hi, Have been reporting an issue to dell on behalf of Warranty update status for my product and I did submit legit invoice of it to get that warranty extension for that product as it was about to expire. But due to some reasons, dell warranty extensions guys reported that This should have to get the update from another department so they assist me how to get it done I did the same. 

I don't know why that dell representative mislead me that he had done with warranty update. as I had seen now it's been a month but not able to see warranty status till now. 

This is my first ever Worst experience with dell for a co-operate client.  

Thanks,
Akbar