OK, good news the address issue is covered. I was just worried you could get court papers and not know about it, not defend, and therefore lose by default. Yes, you could get judgement set aside and yes it would clearly be ECP's fault, but it would be hassle you didn't need.
Yes, it would rile us if you paid
However, it really makes no sense to give in now. The time to give in was when ECP wanted 2 x £60. The fleecers will now not accept anything less than 2 x £160. Court costs would be £100 (£50 legal costs if ECP could make this part stick) plus £25 claim fee + £25 hearing fee.