DHL just keeps messing me around

I have a DHL Express Parcel that has been sitting with DHL since last week. I keep having to follow up and each time I call I am asked to give some information which I do give, two days later still nothing and when I call its, oh sorry we hadn't submitted that. Now they need an invoice which I sent but its not in the right format. So they send me an email with no attachment of the template I should use. This parcel arrived last week and there has been no movement till now. Why did I even pay Express. I never ever have these problems with Aramex or Fedex. I guess DHL in South Africa is really inefficient and doesn't really care about the customer. I definitely will not be using them again and if a supplier insists on using them, I would rather not deal with that supplier.