Here is a Haier W852 Stock ROM Firmware which can be used to load and flash stock firmware on any Haier W852 of this exact variant. Any MTK Flash tools can download and flash this Haier W852 flash file on your W852 so long as that MTK Flash Tool supports MTK Scatter File.
Since most major software malfunctions on any MTK Android devices can only be corrected by flashing, this W852 flash file, if properly used, can unbrick (debrick) your W852 and also corrects any software issues your Haier W852 may currently have. Also, keep in mind that when you load stock firmware on your Haier W852 using any MTK flash tool, your Haier W852 will be reset to factory defaults settings and by that, definately, your UserData will be lost including contacts, messages and others.
Note: If your W852 is already bricked and you want to unbrick it, you will need to pay closer attention to the tutorials contained below here.
Haier W852 Stock ROM Firmware Download Link(s)
1. Haier W852_MP (Android 4.2.2) Stock Firmware
2. Haier W852_MP_RU_S98513A1_V005 Stock Firmware
How to Flash Stock Firmware On Haier W852
1. Download your Haier W852 stock ROM firmware from the link above.
2. Extract the Haier W852 Firmware you downloaded from the link above onto a folder on your PC.
3. Download and install MTK android device drivers on your PC. You may skip this step if you have installed MTK drivers on your PC already otherwise, download MTK drivers here
4. Now, choose either of the tools listed below here to load the stock firmware on your Haier W852.
2. NCK Box
3. Miracle Box
See video tutorial here: How to Flash MTK Android Devices Video Tutorial
Note
1. Each of the tools listed above contained step by step guides with illustrated pictures on how to flash stock firmware on your Haier W852.
2. If your device is bricked already, I recommend that you use NCK Box or SP Flash. Both are the safest toolS for flashing MTK Android devices.
3. If you require any further assistance, simply drop your comment detailing the issue(s) and I shall help you revive your Haier W852, if need be.