Poor Service

I ordered two phones from Aliexpress.The supplier told me the only way to get it to SA is with Dhl.The phones arrived at customs and they wanted proof of payment.I emailed it and they said the price on the items and the price on the proof of payment is not the same.I told the supplier and he gave me a invoice that I mailed to Dhl.No reply for almost 2 weeks.I already paid almost R600 to Dhl for customs fees.After almost a month Dhl phoned me and said I must write a letter and mail it.The guy from Dhl told me he was going to email me and I must respond to that email.Almost a week and a half later still no email.This is the worst service ever and not the first time I had to pay in enormous amounts of money to Dhl.Please suppliers dont use them.