DLF Home Developers Ltd — wrong commitment made by dlf before selling and

Abhishek working with this organization promised me flat no b2/1219 forapprox rs fifty four lakh only. I paid all my amount in january 2019 now dlf is asking to pay about three lakh more they are saying abhishek has given you nothing in writing and he has left now you have to pay more as per company demand. And for your information he has given me in writing that maintenance will be charged at rs4/per sqft now dlf is saying that it will be charged 19/per sqft. I have paid all my amount as per commitment they all are mentally and physically harassing me. I am saying if you all are not agree with your employees commitment then return back my money with interest. I have paid by cheque rs5344059/ and rs 50347/ by way of tds total rs5394406/