I wouldn’t waste your time - we had the same thing with DHL tracking and wrote to them 5 times. We get 3 different sets of responses anything from “we have noted your comments on your account” to “please submit a plan of action as to how you will not exceed the pre-fulfilment cancellation rate” with threats about our account remaining suspended when the pre-fulfilment cancellation rate was 0% and no account issues. The other type of response was that the valid trakcing rate didn’t meet the metrics but they were referring to .com and not .co.uk where the rules are different. You can do more harm than good trying to resolve issues like this with Amazon. There is no care taken by the Performance Team and it’s unclear whether a human even reads the messages - it’s frightening that they have such control over your account. In addition, they didn’t seem to know half the time that they have responsibility for Premium Shipping eligibility and would refer the case back to Seller Support who would ping pong it back to Seller Performance.

We just waited it out until the invalid tracking rate went back up to the minimum level. I should point out that there were no issues with the tracking - Amazon’s system fail to validate 1 in 30 - 40 DHL shipments.

Since they were so unhelpful and the message doesn’t seem to get through, we just report the DHL invalid tracking errors on a per order basis. There doesn’t seem to be any other way of getting the point raised and through effectively so we might as well report every instance it happens.

I’d like to think it’s done the trick as for the last month touching wood there haven’t been any invalid DHL tracking numbers.

In regard to you particular situation - UK Mail was not one of the approved carriers last time I looked… They have now rebranded as DHL Parcel but to my knowledge only DHL Express (different company) are approved carriers for premium shipping.