Disappointed customer

Bought a dell laptop settled my account within a month due to an unexplainable arrears charge, to avoid further headache, only to be debited the following month , that was September, settled 26 Aug 2020, to date no refund and no settlement letter as requested.. laptop giving problems , dell technician tended to it 3 times already, store refusing to exchange or refund... incredibe connection I am truly disappointed in the service received this far in resolving this issue 1) my refund please 2) exchange or refund for Dell laptop