Faulty consumable resulting traffic fine

I took my vehicle to CMH Kempster Ford Randburg for the capped service special on 07 Dec 2017. I was contacted by them to replace my brake lights at an additional cost. I happily comp****. On the 24 Dec 2017, less than 3 weeks later i received a traffic fine due to one of brake lights not working, a brake light that was replaced by Ford. I was told that they could replace the faulty globe at no charge but the traffic fine was mine to deal with because the globe is a consumable. I took my vehicle back to Ford for the replacement of the globe and they insinuated that it may be faulty wiring but upon completion of the globe replacement there was NO mention of any issues with wiring and I was told that there was nothing they could do to assist with the ticket but the globe was changed. If it had not been for the substandard /faulty globe that was replaced I would not have been fined but CMH Kempster Ford Randburg refuses to acknowledge the role they played in this exasperating matter and I am looking for a way in which this matter can be dealt with that does not have me parting with more money