I've used eXch multiple times with a great success and I love this website but today I made a mistake. I used Bitcoin Lighting network for the first time and I didn't know that you pay as much as Lighting Invoice tells, so, I spent a wrong amount and received half amount on Lighting address. In other words, I wanted to pay two things but LN invoice allowed me to buy 1 thing but I paid for two on exch. In other words again, for example, I spent 1 Bitcoin and received 0.5 Bitcoin on LN. I know that this is my mistake but is there a chance for me to get the remaining balance back? Can we solve it here via PM or is it better to contact them via email? Also, is their support good? Do they answer quickly? (Service is good).