A bit over three months is a fairly short time span for many big organisations to pay out in, so I wouldn't get too concerned.
However if you continue having problems, the relevant body to appeal to isn't the County Court but the Civil Aviation Authority. email
[email protected], phone 020 7453 6888 (Mon to Thu, 0930 to 1430 only) or write to:
Civil Aviation Authority
CAA House
45-59 Kingsway
London
WC2B 6TE