There is a delegated service plan A, with yearly period, recurring fee - 10 USD. It was decided to increase the price (on the provider's level), the resellers were synchronized. However the reseller continues to be billed by old price for the services their customer purchased earlier than price change, meanwhile new purchases are already billed correctly.
With tariffs implementation it became impossible to change the prices for the reseller in the middle of subscription period.
Since OSA 7.0 the price the reseller pays will only be synchronized with the updated one when the end-customer renews his subscription/changes plan/period.
There is a request with id #PFR-315 ("[BSS] Synchronize reseller buy price") to implement a way for the prices sync in the middle of the subscription period. Please contact your TAM/pta team to clarify the status of the request.