My Vgp — charges

Address:	SO19 6LZ
Website:	goo.gl/6zRjHS

Unaware that i had signed up for a trial for face cream, i received not only face cream but eye serum as well (Which i never ordered). Since it wasn't much money i didn't think of complaining. However, i recently received another set and then realised that i have been charged full price for cream and serum. I rang up and cancelled this a couple of weeks ago and i have now realised i have been charged yet again for the two products despite them assuring that they would cancel it.
Please can you tell me why i have been charged for something after i had already cancelled it.