THIRD month waiting for replacement package to be released! Never use Fedex!

In December, my husband ordered a replacement car part from the US, as the one they sent was damaged. It arrived early January. And has been sitting at customs ever since. My husband duly sent all the documentation, early Jan, that the utterly inefficient clearance administrator didn’t submit. After a month of getting nowhere with this woman, she asked for our (already sent) documentation!!??♀️ Asking questions that we had already made clear. Like asking about the part we sent back, when we had made it clear that it was sitting in our garage, broken, & this was merely a replacement. The supplier in the US even sent all the proof of this, appalled by how long it had taken - a MONTH ago! I have been begging for it to be released ever since. We are entering our third month of utter frustration. Every mail is met with “the documentation is still pending with customs.” Every call is met with elevator music, & 2 times out of 3, being cut off after waiting for 20 minutes. It’s like banging your head against the wall. We have never met such utter incompetence & inefficiency. The woman we are dealing with does not have basic comprehension, not the ability todo her one job. We are appalled that something we paid for months ago, is being help hostage, as someone cannot manage to do her job. This is a simple case of releasing a part that has no value, due to it merely replacing an already paid for part, that was broken. We are still waiting. And will certainly never use Fedex again. This experience has been abominable. I have been asking this woman for her senior’s details, which she refuses to give me. I do look forward to speaking to someone senior at Fedex, so this case can be reviewed by someone who can actually help us. We need this case to be resolved. Urgently. Please!!!