Aramex Couriers — Where to pay custom taxes or can I pay on delivery

Tracking Number: [protected]
Courier: DPD - Air Classic
(Online shopping site lookfantastic)

My parcel (Sebastian shampoo.conditioner and mask) has been on hold for custom taxes..and i have recived their mail to pay the amount..I'm asking them where do I need to deposite the amount (account number) or can I pay on delivery..no one from aramex is even bothered to reply or atleast attempt delivery so that I can pay at the time of delivery..

I'm constantly sending them emails but they are not even replying..please help me with the issue