Airtel — 3G network issue

Address:

Kanchipuram, Tamil Nadu

Earlier I was with Vodafone really had a good experience on 3G connectivity also when I was in Roaming but because of a Stupid sales person from Airtel sales I switched my network to Airtel, that was my last day I lost my 3G network on the very second day itself started to face issue on network whenever I connect my Laptop using my mobile for downloading 5mb file also I have to wait for 20minutes not even able to use Whatsapp, and other Apps on my mobile even my voice calls also really poor even though I do have 2GB data each and every month but no use on that whenever I call customer care they use to change Sim or give some settings which no use on the second itself they said to change the new sim card cause its a simcard issue that's why network coverage is not good but I have used a Vodafone sim card on the same mobile for maximum of 6years... my kind request pls do not take Airtel if you're already on that network pls switch to some other