INVESTMENT CONTRACT CHANGED WITHOUT ME KNOWING

LAST YEAR 2015 NOVEMBER I MADE UNIT TRUST INVESTMENT WITH THEM,THEN WHEN I ASKED THE ADVISER TO GIVE ME THE LINK TO TRACE MY INVESTMENT THEN HE SAID HE WILL SEND BUT EVEN TODAY I DIDN'T GET THE LINK. ON THE 29 FEBRUARY 2016 I WENT STRAIGHT TO OLD MUTUAL TO CHECK MY MONEY ON HOW MUCH INTEREST I GOT THEN WHEN THEY CHECKED FOR ME IT WAS LESS THAN WHAT I SIGNED FOR,I INVESTED R36,500.00 AND I GOT 33,336.00 OF WHICH IS THE OPPOSITE OF THE MONEY WE AGREED WITH. THEN WHEN I CALL HIM HIS ALWAYS BUSY OR HE SAID HE WILL CALL ME BACK. THE MONEY PER ANNAM MUST BE R 42000.00 TO R 43000.00 NOT LESS THAN THAT. THEN WE CALLED THE OLD MUTUAL TRUST UNIT TO CHECK FOR AND SAID I SIGNED FOR THAT, ON THE CONTRACT OR THE AGREEMENT THE WAS NOTHING LIKE THAT.PLEASE HELP ME TO GET MY MONEY BACK.