My Rebate never came

Why did you say I had a rebate  of $5.00 off the shipping cost then charge me$7.95 shipping. DUH !  I work for the Post Office the shipping cost per- weight should only have been $3.45?  So you stole $4.50 from me under the use of the Post Office / UPS system. ( Its Two of The Greats Mailing and Employers The  UNITED STATES Has to offer.) And you as a CHUMP has lost me and anyone that puts their  EYES to this ABOVE THIEF.   PLEASE CANCEL MY CATALOG MAILING.
                 V.BORELLI