KLM Customer Care Pathetic

I booked a flight through an online agent. I selected seats for the flight from CT ro Amsterdam. Iwanted to chnage it to more legroom from 63 A and C to 50H and J. On the KLM site i was directed to to chnage the seats all was fine until i wanted to pay then there was a technoical error and i was instyructed to caqll *** which i dis. The "customer care"agent went throug my request ands then said o there is a technical error- and this is the 3rd time!!! When i askedto speak to a supervisor or manager as it can only be so difficult to change and pay the difference she just dudely cut me off. On you tapes the call should reflect arounr 12-50 on 22 May 2025. It is the most pathetic excuse for a call centre as i have ever come accross.Iam truly sorry that i have selected KLM as my carrier