Pity you didn't comme on here first before submitting reps, as we would no doubt have told you Havering, (to their everlasting shame), do not re-offer the discount in any circumstances, unless it is mandated by law, which it isn't.
Anyway, having now had your reps rejected it is now a total no-brainer to take them to London Tribunals. The penalty remains the same.If you win you pay nothing, if you lose you pay the PCN penalty, there are no other costs. However, stupid Havering must prepare an evidence pack and also pay the adjudication fee.