Internet cut off day after cancellation

CONFUSED!! 

Hi, so I had a contract with virgin just the broadband and finished the contract around the 3/2/24 this was then cancelled around 13/2/24-14/2/24 as this had to be terminated due to a split with my partner as was in his name. I have my new virgin being installed on the 26/2/24 and while on the phone I was promised that my Internet would run until Sunday the 25th however to my shock my Internet has been cut off in the early hours this morning leaving my autistic child without access to anything he need online. 30 day period notice and payment for this month to have it cut off day or two after? I'm quite shocked to say the least as that's me now looking at 13 days no Internet with a 17&13 year old both relying on WiFi for college/school work. I double triple checked with the nice lady on the phone that it wouldn't be cut off until given date. Now I'm left with no Internet and paying for a month I'm not even able to use it for please someone get in touch and help with this issue. How can be asked to give a 30 day notice and to pay a bill if words aren't kept by the provider? I know my ex gave 30 days as this was also mentioned on the phone call I had and we was made aware to pay for this whole month to keep it running until the 25th. Needs resolving as it's caused a big issue for my children . Thanks