regarding Wazamba.com, it's my first time seeing that gambling site
I guess we are in the same boat 
I checked them on casino.guru, they have a very high rating of 9.7/10 though they have a lot of complaints, 173 in total, 59 of them solved, 0 unresolved cases and the rest are rejected. even though what's going on is annoying I suggest lengthening your patience.
Maybe the high safety index is because they promptly respond to the complaints and don't abandon them. Most of the unresolved cases are due to the complainants abandoning the threadsMost of the resolved cases have also resulted into the players getting back their money. So definitely the safety index stays high.
On the contrary, if you look at the reviews, they are very low/bad on casinoguru
On trust pilot as well - https://www.trustpilot.com/review/www.wazamba.com