Customer service @ the Edmonton store

Called in today to see if they had medium oatmeal, which hasn't been in stock at the Selbourne Walk store in Walthamstow for some weeks. The two Clerks in the at the tills walked away when I approached them with my items,attending to two separate customers who were either looking for a product or had questions about a product.
The male clerk passed me at the till, going to another aisle, asking his colleague where a product was, then stayed with the person, all the while the queue is growing. I asked if there was anyone at the till(waiting about 3mins now), the female glanced back saying she was serving a customer. I waited for 30 seconds later then walked out. The male got to the till as Inwent through the door asking if he could help. I replied NO.
Never again will I go to this store.
The queue could have been attended to by one clerk whilst the other served the people waiting at the till.