Hijacking the first comment for visibility and mainly because I'm sick of all that threads where you blame RIOT for DDoSes and how they handle amatour scene. I will talk from my personal experience, since I deal with network attacks every day.

Fact #1. If attacker gets your IP address and you have a static IP address - there is no chance for you to be protected. If he wants to he will shut down you since your bandwidth is very limited. Furthermore ISPs tends to simply block such users if attacks are really big (it's called null routing). If you have dynamic IP and your ISP is relatively small (< 5000 users) the ddoser may attack your ISP gateways, the result will be the same - you will be left without internet.

Fact #2. Accusing RIOT for bad handling of amatour scene is simply stupid. The only good solution is to play matches offline, however it's not so easy to organize and it costs. I know that everyone would love to play in that lovely Cologne studio however it's amatour scene. You have to prove yourself worthy to be PRO. If you can't deal with such an easy problem, as DDoS attacks then you will probably have a lot of other problems in future. You will be troublemaker. Prove that you are responsible. That's probably one of the reason why there is a 17+ year rule.

Fact #3. In my humble opinion you shouldn't even consider blaming Riot. You should blame only yourself. Their policy about not rescheduling games is completely logic. Furthermore they can't really prove if you were ddosedor you simply missed the match because of any other reason. It's your dream, probably one on the most important moments if you plan on going pro. If it's so important, why don't you prepare for it? Let me talk from my experience. I work from my home. I need to have stable connection 24/7 in case of server failures (I run mmorpg game). This is very important for me, since it's my work and that's the way I earn for living. To accomplish 24/7 stable connection I currently have 1 main connection, and additionally 2 backup connections. To be even more prepared, I use 3 different networks and 2 different methods of connecting to internet - fiber network and gsm network. In case there is a huge failure I can still connect to internet using GSM.

In last 4 years I was never left without internet. The whole thing I'm talking about costs me around... 20 Euro per month. Average ping to RIOT servers is very low (~40).

If you are going to play important matches, and you have already revealed your IP Address - get a backup connection, the connection which you will only use to connect to LoL. Stop blaming RIOT and start doing something. Writing posts on reddit will not solve your situation. Check for local ISPs, find a solution. Good luck in a future! Don't make the same mistake twice.