There were nine series featuring the witch T-Bag, each of which had the same basic formula of a girl touring various fantastical locations and collecting magical objects with which to defeat T-Bag. None of the girls was called Victoria, though. There wasn't an overall title for the show, but the individual series were:
1) Wonders in Letterland (featuring a girl called Debbie collecting gold letters); 2) T-Bag Strikes Again (Debbie collecting numbers from a clock-face); 3) T-Bag Bounces Back (Debbie collecting bells); 4) Turn on to T-Bag (Holly collecting crystals); 5) T-Bag and the Revenge of the T-Set (Sally collecting silver spoons); 6) T-Bag and the Pearls of Wisdom (Sally collecting the titular pearls); 7) T-Bag and the Rings of Olympus (Polly collecting the titular rings); 8) T-Bag and the Sunstones of Montezuma (Penny collecting the titular stones); 9) Take Off with T-Bag (T-Bag herself collecting golden envelopes). You can find out more at this website:
http://members.tripod.co.uk/jrv94/