If they cut off your service, especially if they did repeatedly. You need to document ( record it using a a call recording app) and call in again. print out your bill and records. Also print out your contract. Call in tell them you are terminating your contract, and inform them of a better no bullshit deal. Even if its bullshit. They will put you to their account retention team. They’re Customer Service with super powers. Inform them you talked to your lawyer who works for your business and is on retainer, you and him read your contract (print out and read it- the whole thing) and tell them you both agree that the loss of service during a vital business trip and their repeated failure on acknowleging the calls constitutes a material breach of the terms of the contract. In North America anytime either one changes or fails to adhere by the terms of the contract, even if your pricing changes without your express consent you have a 30 opportunity to exit the contract with no penalty to you. Inform them that you are making the UK equivalent of a freedom of information request for all records of your calls to customer service and all associated trouble tickets. And you will be terminating your effective the following day, (it always takes 30 days so you can back peddle) unless they can resolve the charges immediately and credit you back for a month for the interruption of services that were highly inconvenience while aboard and the lost time for calling in. Get reference #s and repIDs for any future calls Ask them for their legal department’s contact information and their media relation department contact info bacause your lawyer will contact them about the termination of the contract and youre going to the media. Based on my experience you will a) certainly be able to get the charges removed. Speak only to a supervisor, get whoever you speak to, to give you their REP ID and incident ticket # created for the call, ask that person to take ownership of the incident and commit to a time and date where they will call you back with the outcome and to note that agreement on the ticket. inform them that failure to respond to this attempt will transfer all further interaction via your lawyer and the media. If you do it right it will work b) if you want out you can also probably justify being released from your contract terms.

Hope that helps