Olivea TV Model 247 FHD T11 volume problem- Volume control bar must be extended half to 3/4 way to make volume adjust, volume unstable. I tried to adjust with menu, no success.The last time this happened Olivea Customer Service talked me through steps. I checked the manual. I called 800-965-3842 number no longer working. Does anyone have Customer Service number for Olivea? Website to ask for help? Thank you