Slow Lounge query not resolved after a month.

My complaint is specifically against the Ebucks Lifestyle desk. Firstly as background: I am a private bank client, on ebucks level 5 and have yAccounts for all my kids. On 22 October I booked our flight tickets for the December holidays. Prior to making the booking I called Ebucks Travel to confirm if my children will qualify for Slow Lounge access if I book for them through the Ebucks app and use a voucher from lockdown last year for me and my wife on the same flight. This was confirmed by the consultant (I double checked with him to be clear). I did exactly as he advised and send him our flight reference as proof after the booking. The next week however when the Slow Lounge visits were not allocated yet I called again and was now advised the info given to me by the consultant was in fact wrong and the kids do not qualify. This is unacceptable as I did all on my part and followed the exact instructions as advised by the consultant. The tickets booked on BA were also more expensive than Lift and I was willing to use the voucher at a later stage if needed. Since then I have been calling and sending emails but to no avail. This may not seem that significant a problem but the principle stands. It shows a lack of integrity and makes me doubt the way a bigger problem would be handled in the future. Nobody takes responsibility, just more reference numbers and a 'shrug of the shoulders'.