Need radio code for Citroen xsara

Bought a 1999 Citroen xsara that's almost like new. Changed the battery but don't know the code so bought one online but it doesn't work... the serial number is phacdfw 8012211 can anyone help I don't want to pay for another incorrect code.

Bought a 2004 Honda Jazz. Changed the battery but don't know the code. the serial number is 0776R7400040 AND CAR VIN: JHMGD17304S200731 can anyone help I don't want to pay for another incorrect code.