Biased, unfair & liars

I complained to the FOS about Halifax Bank with plenty of evidence to support my complaint.
There was a taped telephone conversation where not only did the Halifax member of staff discuss my sons account but also lied about it and my son.
Halifax refused to give this evidence to the FOS stating that they no longer had it, so the FOS agreed with Halifax that what I stated had happened in this phone call had never actually happened, as Halifax wrote a letter to that effect.
I also sent further written evidence that showed the treatment I had received by Halifax and the FOS decided to ignore this evidence.
I complained about the FOS and another review was carried out where again they stated that the ombudsman had looked at all the evidence when they had a letter clearly stating the ombudsman was not going to look at my evidence in the form of letters from Halifax.
They are one side, biased and a total disgrace and I would never recommend them to anyone. They are clearly in the banks pockets who pay for their service.
Debra Robinson