Bad customer service

I have been a loyal supporter of AliExpress for many years and until recently I am doubting whether or not to continue to do so. My experience with my last purchase is one of very high disappointment in the platform. My purchase went off smoothly, the time it took for it to arrive in my destination country was okay and then the problem started with the back and forth blame game. The seller blamed AliExpress because they say that AliExpress choses the carrier not them. AliExpress says the issues with the carrier company and my customs office, The carrier does not respond to my emails and my customs office says that they can not pickup my tracking details I must contact the carrier company "Speedaf Logistics" which incidentally is the subject of my previous review on this platform. I feel that it is incumbent on the service provider "AliExpress" to engage with the carrier that they have utilised, and not the seller nor the buyer who have absolutely no control or say on who AliExpress utilises for their carrier service. I agree with the seller that AliExpress needs to resolve the issue with the carrier and not shift the blame to the buyer and seller. If AliExpress continues in this trajectory they are definitely going to lose their already dwindling customer base. I lost a bit of money but the overall service received was worst