Increasing your mortgage from 250k to 320k (for example) over 30 years looks like it will cost over €60k in interest alone, and that's only at current rates.
In your other thread you mentioned that the €36k in loans were for your house deposit. If it were me, I could possibly justify refinancing this amount due to the fact that, with the property market the way it is at present, waiting to save the deposit yourselves at that time may have meant you would be borrowing an extra 36k anyway to meet the more recent prices. So that could theoretically net itself out and you could justify it if you were in a squeeze.
But there's no way you should be remortgaging over the long term for credit card debt and a wedding day. Put the wedding off for a year or two, have a smaller wedding, maybe go overseas, but don't pay for that one day for the next 30 years. It will end up costing you twice as much, at least.