APCH CTLR AT CLT CANCELS A PLTS IFR FLT PLAN AFTER CALLING A FEW TIMES; USING AN INCORRECT CALL SIGN; AND NOT RECEIVING A RESPONSE FROM THE PLT.

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I WAS ON AN IFR FLT PLAN (FLO TO HKY) ALONG A 124 NM TRIP WHICH CROSSES ACROSS CLASS B AIRSPACE CTLED BY CHARLOTTE APCH. I PLANNED THE FLT TO TRAVERSE CLT AIRSPACE MAINLY DURING A PUBLISHED SLOW TIME. AT THE PLACE INDICATED ABOVE; I HEARD THE CTLR CALLING ANOTHER ACFT; BUT HE IS UNABLE TO RAISE THEM. I DO NOT RECALL THE OTHER ID HE WAS USING. AFTER A FEW ATTEMPTS; FINALLY HE TELLS THEM TO SQUAWK VFR; RADAR SERVICES TERMINATED 'FOR NON-COMPLIANCE'. AS I NEAR WHERE MY USUAL HANDOFF SPACE IS; I HEAR THAT THEY HAVE CHANGED CTLRS (NEW VOICE) AND HE SAYS XXXXX (ME) IDENT IF YOU CAN READ THIS. I OF COURSE RESPOND BY RADIO 'XXXX READ YOU LOUD AND CLEAR.' HE RESPONDS 'SIR THE LAST CTLR TRIED RAISE YOU AND YOU DIDN'T RESPOND. HE CANCELLED YOUR FLT PLAN; RECOMMEND ATLANTA CENTER ON...' I DO NOT REMEMBER THE FREQ AT THIS TIME. I WAS UNDER THE IMPRESSION THAT NOBODY EXCEPT THE PIC COULD CANCEL AN IFR PLAN IN FLT. I RESPOND 'HE WAS CALLING ANOTHER ACFT; HE WAS NOT USING MY ACFT ID' I GOT NO RESPONSE. RATHER THAN WAIT AND HAVE A 'RADIO FIGHT' I CHANGED OVER TO ATLANTA CENTER AND HEARD THE ATLANTA CENTER CTLR GIVING TFC XING MY ALTITUDE AN ALERT ABOUT ME AND HE SAYS TO THE OTHER ACFT ' THE OTHER CTLRS HAVE BEEN UNABLE TO RAISE HIM; HE'S NOT TALKING TO ANYONE'. SO I CALL IN 'ATLANTA CENTER XXXX IS TALKING AND THE LAST CTLR WAS USING THE WRONG ACFT ID; PLEASE ADVISE LOCATION OF TFC?' HE RESPONDS WITH SOMETHING; I DO NOT REMEMBER WHAT BUT THE TFC WAS NOT A FACTOR; SO HE FOLLOWS WITH 'SIR OUR ARPT IS 12:00 5 MILES; DO YOU HAVE IT?' I RESPOND 'XXXX HAS THE FIELD.' I WAS THEN CLRED FOR THE VISUAL APCH; AND THE REST OF FLT WAS UNEVENTFUL. HUMAN PERFORMANCE PERCEPTIONS; JUDGMENTS; DECISIONS-CLT DOES NOT FACILITATE GA ACFT IS MY PERCEPTION; AND THEREFORE THEY MAKE FLYING THERE DIFFICULT AND THIS TIME DANGEROUS. ACTION/INACTION 1) INAPPROPRIATE ID USAGE; AND INAPPROPRIATE CANCELLATION OF IFR FLT PLAN. 2) I COULD HAVE MISUNDERSTOOD THE CTLR AND FAILED TO RESPOND WHEN I WAS CALLED. FACTORS AFFECTING HUMAN PERFORMANCE-I WORKED ALL DAY BEFORE MAKING THIS 1 HR FLT; BUT I DID HAVE A NAP. THE CTLR MAY HAVE BEEN TIRED; AS ANOTHER CTLR RELIEVED HIM; OR MAYBE HIS SHIFT WAS OVER. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR SAID AFTER LNDG HE DID NOT CALL THE CLT APCH FAC AND TALK TO A SUPVR FOR FEAR HE HAD DONE SOMETHING WRONG. HE SAID HE HEARD THE CLT CTLR CALL AN ACFT 4 OR 5 TIMES USING A CALL SIGN THAT WAS COMPLETELY DIFFERENT THAN HIS CALL SIGN.