Went to Costa Coffee at Junction 27 Tiverton to purchase a mango and passion fruit cooler. The store was busy and there was long queue waiting whilst 2 servers tried to get the orders out as quickly as possible. I paid for my drink and waited patiently for my order only to still be waiting whilst they filled the cups, fetched more toasties, cooked toasties and filled the next customers order whilst I was still standing there. By this time two extra members of staff came out and I had to remind them they had not filled my order otherwise I would have still be standing. When she did fill my order she give me my cooler proudly saying I’ve given you the next size up due to the wait. Whoopee do, that was what I had paid for in the first place. When I started to drink the dam thing, I found in her haste to make the drink she hadn’t blitzed it properly and ice lumps got continually stuck in the straw which ended up a useless soggy mess but by this stage I was too far away to bring it back. Note to costa, when you are busy you should have enough servers on duty to cope with the demand and at these times you need to have a system in place so customers orders are not overlooked.