Bad service from DHL Express

The service received from DHL Express has been appalling. I sent out a package to Tanzania on the second of September 2020 and was notified that the receiver needs to pay custom duties and we arranged to have the charges billed on the courier company account that we use. I have followed up with one response from Lucracia and the package is still not delivered. I was told that they will charge us a storage fee for everyday the package isn't cleared. The requested paperwork was submitted on time and to my surprise today I followed up again on email with no answer and I called them only to be given another case number and promised that the tracing team will contact me in 2 hours but no one came back to me. The guys who promised to have this sorted as soon as possible haven't responded to any of my emails. Eric Mahlaela, Tumelo Nzimande and Lettie Dlamini and Lucracia Olifant are all very good at making promises but never follow through with anything.