What did you spend your gems on? 109€ buys you 10.000 gems, or something like 20 heroes summons and 30 troops summons. The chance to get a 5* hero or 4* troop is a few %. It is likely to get at least one, but no way guaranteed.
The summons are pure luck. And there is no bad luck prevention. If you summon 30 times and don’t get a 5* hero then the next 10 summons will have the same chance as the first 10 to give one.