Very poor service delivery

I have been experiencing the worst service ever from Buffalo International Logistics. I placed my order on the 24th of March, paid my VAT & Taxes the same day I got a message from them and they still havent delivered, They are saying my address is wrong from their side which is weird because it wont be the first time I will be getting my parcel delivered by them. I have been calling them everyday to get my address to be updated but noone is assisting me. They keep on saying they are escalating the matter but whenever I call to check if the address was changed I get the same thing. Their agents are *********** and not transparent to the customers and they lie. I have asked to speak to managers but all the time the agents are telling me that the are no managers on the floor to take over the call. The last agent I spoke to today is Chelsey Jones, she was also not much of assistance. I am very upset, i have a wedding coming up and it seems I will not be able to use the things I purchased for that event due to the incompetence of Buffalo International Logistics!