That's the risk you run with any service provider.
At one point I had servers at The Planet/Softlayer and after a year they had a new deal with the same server/hardware with more memory for half of what I was paying. I ended up ordering a new server, and having to move my data and everything because the sales rep couldn't get me the new deal on my old server.
I've tried, like when I needed a bigger server but everything was sold-out, so I asked to customer services if they can apply the new price for my old server, they refused, after this I waited for a 7 months for the new servers begin available again, and then in dec/2013 they also discontinued the "new" servers without anything else in place and I cancelled my account.
At one point I had servers at The Planet/Softlayer and after a year they had a new deal with the same server/hardware with more memory for half of what I was paying. I ended up ordering a new server, and having to move my data and everything because the sales rep couldn't get me the new deal on my old server.