Many thanks for your patience, I am pleased to be able to continue assisting with your query now. First of all, I am sorry to hear about the issues you have experienced in your situation.
There are various such companies which advertise their services and promise to recover money lost to scammers, but doing so is much easier said than done. Whilst the company Ellis and Burlington is itself legitimate, in a sense that it exists and operates a business, what they do is not necessarily what they promise and what they make out to be. All you have to look at is various reviews left by previous customers to get an idea that they are not actively engaged in pursuing the scammers and locating them and getting your money back, they instead provide you with tips and letters to approach others, like your bank, card companies, etc. to try and get them to help you using any available fraud protection they may offer.
I must honestly advise you that it is very rare for victims of such scams to get any money back, or for the scammers to be dealt with. The reasons for this are as follows:
1. The scammers are located abroad, often in countries where the authorities are far from efficient in dealing with such crimes. Even if not abroad, they are very good at hiding their tracks and real identities and use all sorts of computer trickeries to do so, like re-routing calls or hiding behind computer proxies, all with fake identities. Also, as there are far too many scams like this and there are simply not enough resources to deal with them all.
2. Even if you manage to locate the scammers, you can't force the authorities to act and apprehend them and to recover any money for you. All you can do is report them but what happens next is up to the authorities. The alternative is to sue the scammers directly, however that is likely to be a pointless exercise – they will unlikely participate in the claim or follow the rule of the law, even if ordered to pay by a court.
Do not get tempted, in desperation, to waste more money on a service which is very unlikely to actually get you your money back. What they do may be slightly helpful to a degree, but it is probably unlikely to justify the fees they will charge you for it.