I ordered a one month sim so I could see if three was right for me. Given that you need to give 30 days notice to cancel contract to avoid it rolling on to the next month, I rang them on the day I received my sim.
I them had a long 36 minute phone call to India repeating that I wanted to cancel the contract when it came to an end. They tried to sell me a "flash offer" deal of a reduced 12 month contract which was identical to the one on the website, or wait a week or so to evaluate my decision (by which time there would be under 30 days notice so would automatically be enrolled to a second month.
This is so unacceptable, as it should not take three different people trying to sell me a new contract or say how they thought it was stupid to cancel it after less than one day, just to stop the contract continuing after the month is over.
I am seriously considering not starting a new 12 month contract after my current one finishes, like I was thinking about doing before, as three are rude and given me a very bad impression.