uSDX+ HF Transceiver Problems 

Problems with my uSDX+ HF Transceiver that need to be repaired.
1. Constant digital noise heard at volumes below 6
2. Feedback squeal heard at volumes above 9
3. Push button "E" on main control knob is intermittent
4. Main control knob backward from standard; clockwise turn should increase volume and frequency
5. No battery installed when the listing on Banggood, in the "Introduction" section, of the description, it says, "It has a built-in 4000mAh lithium battery"
Please repair:
1. The main control pushbutton switch
2. The audio problems
And
3. Install the 4000mAh, indicated in your listing description
4. Include the 12.6v battery charger with the return