Pathetic Service!!!

I have upgraded Online with Pretty on the 9th of March . We did the upgrade for the samsung galaxy S7 . A few minutes later i called back this was around 4 in the afternoon to speak to pretty to change it from the s7 to the s7 edge . after being transferred to 4 people and holding on for 30 minutes i was told pretty leaves at 4 . They would send her and email to contact me . i got in the next morning and called pretty and advised her i wanted to change from the s7 tp the s7 edge . i was told the delivery company was out with my order ??? anyway i asked her if we can do anything she said she would need to call the order back check it cancel my current upgrade and then reapply which will take 21 days if not less , i advised her i was fine with that. on the 18th of march i got a call from RTT wanted to deliver the s7 i asked them to hold on while i speak to pretty . again it was impossible to get through to consultants and when i do then i have to be transferred . I had to deal with the most arrogant consultant (please go back and listen to called from the 18th ) with no help . i called again this morning and another man decided to be rude and not helpful. This is PATHETIC !!!