Vivacon is hard work. This was for internet.
Our experience with the scoundrels was very similar to yours.
This happened to us about 8 years ago.
Basically we went to shop in Varna in May, signed and paid for 12 months, though we knew that we would only need it for 6 months as we were returning to UK. In September.
We thought that we had signed up for a 12 month contract.
For some reason, which I cannot recall, we were only in Bulgaria for 3 weeks the following year.
The year after this in Bulgaria, we received a call from the local Vivacon office to inform us that we owed them money. Mrs Doe became rather heated and used various Anglo Saxon expletives, to the moron on the other end, who intimated that the police will be up shortly.
Anyway we ended up paying 6 months unused rental to these scamsters.
Whatever you decide on, do not let the scallywags into your bank account
How to get around this unfortunate situation-