The other option is, on your next manic spending spree, do not pay them and cite clinical/mental insanity for non payment, as you were not of sound mind when using the credit facility. This will stop you for at least for six years with a zero credit rating from obtaining more.
However the stress of impending litigation will make your condition far worse.
If this is a genuine post, then you need to seek help, manic depression is a very serious illness, what you don't need is the panic of not been able to answer the door or telephone because of debt.
Genuine help on this matter is available, if they will not accept your medical practisoners advise, then you need to go to the head of each credit reference agency. The CAB can do this for you for free or your ICB officer at the DWP @ Job Centre Plus can write on your behalf again for free.
Good luck, challenge your manic side into something creative, not destructive.
The files can then be updated with a notice that states you are not capiable of managing your financial affairs and no credit will be repaid.
Keep as well as possible
Not a criminal but felt like it!!