Sorting Broadband Internet, Wi-fi and Telecoms for a pub in Kent

We are out and about this morning - we have been referred to a pub in Kent which has extremely slow internet. They also have a requirement for improved Wi-Fi and need to upgrade their old phone system to a new cloud based phone system providing much better functionality - it will be a lot more efficient and will avoid missing potential customer bookings which they believe happens at the moment - all pretty easy to diagnose and resolve if you know what you are doing...