Uni t55 multimeter beeping with continuity sound

Hi, mistakenly charged capacitor (220 v) tested via capacitance mode through multimeter uni-t55 which resultantly defected multimeter. Now the multimeter is only beeping with continuity sound and screen displays 1 & high voltage sign at every selection mode ( resistance,  voltage,  capacitance,  ampere etc.) when said multimeter is switched on and probes are also isolated from multimeter. Please help how to repair multimeter uni-t55.
regards 
Ahmad