Add response of oxxo cancel

@@ -199,6 +199,7 @@ module ActsAsChargeable
                        var_payment_at: Time.zone.at(charge.paid_at))
                        var_payment_at: Time.zone.at(charge.paid_at))
         return { error_message: 'Already paid' }
         return { error_message: 'Already paid' }
       end
       end
+      clean_var_variables
     end
     end
 
 
     private
     private

 # Var Version
 # Var Version
 module Var
 module Var
-  VERSION = '0.2.19'
+  VERSION = '0.2.20'
 end
 end