Travelstart bad attitude with irritating marketing

I have a problem with the Travelstart pop up on my laptop. I have booked a flight via Travelstart and since then I have this irritating pop up! I contacted Travelstart a couple of days ago and was told I must change my internet settings to get rid of the problem. Considering I google many companies daily without any pop ups and problems, I don't understand why I must now fiddle with and change my internet settings to get solve this problem. (Which I tried anyway and it didn't work). I phoned Travelstart this morning again and was told that Travelstart marketing is build into the internet and that I cannot get rid of this irritating pop up for as long as I use the internet!! It is a violation of my rights for Travelstart to force their advertising on me via my personal computer. The agent that I spoke to was so full of herself and didn't take my problem serious. She had a bad attitude and didn't care to solve my problem. I am very annoyed with this stupid pop up!!!!!