I was wondering if there was a more formal and polite way of saying:
Sorry to bug you again about this, but we still have not received a response about X ....
(if we still have not received any assistance with X)
Sorry to bug you again about this, but we are still having problems with X and ....
(if we have already received some assistance with X)
I would like to use examples of the two sentences above in an email directed to an organization, but I would like to avoid using "you" or "bug", if possible.
For more context, this is part of an email where we are requesting this organization to fix a service that they provide to us.
Addendum: To clarify, I'm interested in both cases when we directly pay for the service requested and when we don't.