Didn't they show that there was some clause in the agreement Amber made that said that Guneet and her mom can use some part on ground floor for family/social event?
Other than that a lot of interactions between Amber and pammi, Guneet is quite unnecessary.
If AS pisses them off, they can just use the stairs outside so as to avoid interaction with him. In my opinion going to first floor from the outside stairs is more convenient than going from ground floor, yet they go to Amber's area.
Also, I totally agree that they shouldn't be using Amber's kitchen and grocery. It's totally unacceptable. And there are 3 things so far for which Amber should have kicked them out:
1) when pammi said they were going to hog the house - even though it wasn't going to happen, anyone would be alarmed.
2) Anurag's daughter gave Amber toothpaste cookies. - it's not only unacceptable, it could be dangerous. Toothpaste isn't for consumption, and although not common, some people might get allergic reaction to certain ingredients. Guneet sells toothpaste, she should have known better about how dangers of eating toothpaste. I don't know about India, but in the country like USA Guneet might end up in jail for poisoning Amber had he filed a police complaint.
3) when Guneet and Randeep almost set the house on fire.
On the other hand, Amber is not innocent either. It takes two to tango- almost all cases of bickering has equal involvement of pammi and Amber - one of them starts argument, another one blows it out of proportion.. But one point in his favor that it only causes mental stress, he has never intentionally tried to physically harm pammi or Guneet as far as I remember.