No update on clearance processing

My package has now been undergoing clearance for longer than it has taken to physically travel from the UK to South Africa. For the past 3 days the package has been "detained by Port Health" despite it being only clothing. While I understand and appreciate that these kind of stoppages can be beyond DHL, they have been very passive and non committal in responding to my requests for an update. I just get a generic "wait and see" narrative and what seems to be a shrugging of shoulders. Is it actually physically impossible for DHL to proactively contact Port Health and get accurate update on the parcel, and an estimation of how long this clearance will take? I would imagine for the Express rate I have payed I deserve at least that level of service?