Probably worth pausing trying to help at this point. Looks like we're not going to get much further on this thread until and unless the OP returns to explain what they are wanting here and how winning a credit card charegeback will help achieve it, i e :

1) Cancelling and obtaining a refund for the trip
2) Obtaining additional compensation
3) Compelling BA to reinstate the route
4) Compelling BA to change the trip to a carrier and routing city of the OPs choice
5) Something else ?