Thank you. Don’t worry about the delay. It happens to us both. The fact that you may not have the money to pay the bills because of the decline in business is not relevant to whether you owe it or not. It may be grounds for negotiating different terms but until those terms are negotiated, the existing terms are extant. There is a reason behind it but not a defence.
When you refer to the manner in which they said they would not supply you, I presume you are meaning the part where they say they will not give updates if you do not pay the monthly commitment.
It is a matter of degree.
If you didn’t pay them and the day after the payment was due, they wound the contract up, it’s likely they would be held in breach. Many agreements provide for businesses to no longer supply when payments are 14 or 30 days late. In your case, they say that you didn’t pay from May to October 2014 but still used the data. Whether you used the data or not is a matter of factual evidence. If you used it, you are obliged to pay for it.
There is a potential issue with payments being late as to whether that’s a substantial breach which would entitle them to terminate the contract. A court would look at the nature of that and the length of time.
Ultimately, whether they would be entitled to terminate the contract at the date they did terminate it would depend on what the financial situation was that date. There is also of course there are alleged to usage by you, of the data after that date which, as I said earlier, comes down to factual evidence and whether you did use that data or not.