DSV Giving wrong delivery date

So on Wednesday i called to arrange for delivery of my MTN PARCEL thr lady told me it would be delivered on Friday. So I asked het are you sure and she said yes.. As Thursday she called me to say it will only be delivered next week Wednesday as they dont cover my area? After se told me it wil be on Friday so i told her to sort it out aa this was mot the arraignment made with me so she said she will call me back.. After 2 hours i call DSV and talk to another lady and explain every thing to her she also told ne she will get back toe me... So today at 12 i decided tot cL DSV to ask whats the problem woth no one getting back to me.. So they told me at first i need to sort it out with polokwane branch is this my work to sort this out? The also told me that it shows on the system i canceled todays delivery for Wednesday? Thr guy told me he will also phone me back. What do you need ti do to be treated as the customer at this company?