Poorest of poor service. GROSS

After a wonderful day out my family and I went to Mugg and Bean V&A Waterfront on the 1st of January 2019. The store was busy as you would expect. We didn't wait long to be seated which was okay but then it started.. After waiting for AGES, a waiter came to ask us if we have been served (he is untidy with dirty uniform), we tell him no. While we are busy placing our order (busy talking to him) , he starts talking to the table next to us, seriously? No manners at all. Anyway, order placed. We ordered 4 slices of cake with coffees. How difficult can it be to cut 4 slices of cake? Anyway, coffees came, cappuccinos milk was burned beyond measure. We waited so long for it, eventually our cakes came (3 out of 4). We had to get up to go and ask where the 4th slice is...Anyway, by the time the 4th slice came, the table who came in after us, already had their milkshakes and burgers, eating... Really guys? NOT A MANAGER IN SIGHT. NO ONE TO ASK IF THE FOOD IS UP TO STANDARD. To put the cherry on the cake, we asked for a glass of water, we get given a DIRTY glass with warm water, NO ICE, NO LEMON, NO STRAW. Please send the useless management on duty for training as they CLEARLY have no clue how to run a restaurant. I can understand if a restaurant is busy but if you cannot hold the pressure, do not waste my money by opening your doors giving me s SH*T experience. Filthy dirty store with dirty glasses and plates. No management in sight, POOR POOR POOR service. Disgusting to say the least.