If you haven't then you need to pay by 5th September or you will have a fine imposed.
Non-receipt of bill is not a valid excuse as your are deemed to know about it.
Ours has not arrived by post at either Roda or our home address - even though they have it correctly.
Email - sanjavier@recauda.net
There is a chap who speaks good English there and he will send you a copy of your bill by email.