How to open the front of the Buyang anti theft door key

My home has recently been renovated, and the children don't understand, so I bought a Buyang security door. It has just been installed and has not been officially used, but in the process of buying and installing, I have learned their service attitude. The child paid a deposit of 100 yuan, let the seller come to measure the size, they said let us measure it ourselves, otherwise we will be charged, but the child had to go home by himself, in the case of not grasping the size, I called to say that I wanted to return the goods, but they did not agree to return 100 yuan to us, I argued with them, and finally agreed to the door-to-door amount.

During the installation, I saw that the installer and the driver were working very hard, so I bought a bottle of water for each of them. After the installation, there were some broken bricks that were broken due to the installation, and they only helped to put them in garbage bags, but they were reluctant to carry them downstairs (my house is on the third floor), and said that this was not their service item. I regret that my child bought this product.

There is no way to refund the deposit! Extremely poor service! He is more expensive than other merchants.

Eighteen bachelors sold us 1,000 yuan, and the invoice was only 990 yuan. I hope you don't buy Buyangmen!