Flat battery - no central locking

[Coplowe Barn]

Hi, Can Anyone help me please ?
Last night, i had the inconvenience of calling out the RAC following a flat battery as a result of leaving my lights on accidentally.
Following a jump start, i drove home, only to find that i could not then operate the central locking, and had to use the key to close the car. ( therefore presumably the car wasnt alarmed or the immobiliser enabled)
Additionally, i noticed that the radio/cd would not work either.
When i contacted my local garage this morning, they suggested that i had probably blown some fuses, and that because the car was a 04, it wasn't a case of resetting anything.
Unsatisfied with that answer, i 'phoned another main dealer, only to be told that they would have to reset it somehow, and i should book it in.

Any suggestions welcome.
Mark