Very bad news Seb, that is terrible. Did you start off with light mist coats? That is a must when using TS-13 but I guess you have learnt that now
I've used Tamiya clear over Renaissance decals before with no problems - although some Carpenta ones gave me a scare recently.
If you want to try and salvage things, I have some Sanremo 2001 Renaissance decals you are welcome to. Email me your address and I'll sent them off.