Sterling Homes Edmonton

I booked a house through Sterling homes in Edmonton and I paid $1000 to confirm the deal. When I paid $1000 they said the house price is locked for a week. I waited more than a week to get my papers to sign. While I was waiting for documents to sign, the area manager called me and said they need $10000 more if I want to complete the deal. Then why should I transferred $1000 to lock the fee? I feel like this is ridiculous. So I lost trust in Sterling Homes Edmonton. I would not recommend anyone to this builder because they are greedy and dishonest. Never trust them. My rating is 0. Never ever trust Sterling home builder in Edmonton Alberta.