[Going long on a spread bet]

I've picked up a trade that I think will be going well for a good period - I think I got in as it bottomed out. Am I able to just keep that long spread bet position open as long as I wish, as long as funds are in the black etc?

[Granite Shares 3X NIO long ETP]

So if the share price increased with the reverse stock split then why did the value of my account stay exactly the same?

[Granite Shares 3X NIO long ETP]

I logged in this morning to discover Granite Shares had turned my 4423924 shares into 88 and by shutting the position had effectively halved the price of my account in value.

 

Surely this can't be right? IG don't seem to care at all about it.

Any ideas?