Hi, I have made a few Avios bookings on LAN flights (ie flight AEP-NQN).

BA charge taxes on the redemption of:
GBP 7.20 QN Gross Receipts Tax (Domestic)
GBP 17.60 DL VAT (Domestic) - Argentina
GBP 1.00 TQ
GBP 4.60 XR

QN & DL should be taxes based on the fare - which is listed on the ticket as £0.

The exact same redemption flight on LANPass has NO QN or DL charge (so £24.90 less in taxes).

I have a few of these bookings so the extra taxes are amounting to more than £100.

I've tried writing to the address on BAEC Contact site - but they just email back saying they only look at post-flight issues. I'd really like to address this in writing rather than try by phone. I feel BA is unscrupulously charging taxes they are not liable to pay on.

Any suggestion of where to write to?

Thanks