Hello Mo91,
It’s interesting that you still need to use a paper form when applying from Nigeria (and that the application is costlier as well). I just tried it and whenever I pick Nigeria on the website, it directs me to download the form to apply as opposed being able to apply online and submit a digital photo.
I’m getting the Durham PO office as the address to send documents to when I try, while you might have gotten another address at the time you applied. I’d say confirm which passport office was on the DHL package you sent and then ask the agent on the advice line if it would be possible to connect you with that particular office. Most of the times, transferred calls go unanswered and you’ll get the agent that originally answered your call back on the line, but I’ve heard of people getting through after trying many times. Normally, when the transferred call doesn’t get picked up, you’ll be offered a call back. The agent may state that it could take up to 24 hours to receive a callback but be prepared to wait many more days before you hopefully get that callback.
I’d also fill an online enquiry, even though you don’t always get a reply to those. Forum doesn’t allow links to ne posted, so here it is with spaces (just remove the spaces in-between):
https :// eforms . homeoffice . gov . uk / outreach / Passport_Enquiries . ofml
I don’t think you should worry yet as you say that DHL confirmed delivery (and you’ve probably have proof of that). It’s probably just a matter of time before you hear from them and be able to track your application
One more thing I should mention is that the application could sometimes get forwarded to another passport office, other than the one you sent the documents to (not sure about that)