A fight is won in the corner as much as in the ring. If something goes wrong with your account, a clear, well-documented complaint is the fastest way to a fair result. This guide applies to any casino, with notes on what’s specific to Slimking.
Common reasons for a complaint
- A withdrawal held or refused, often for verification, an active bonus or a payment method in another name.
- Bonus winnings removed, most often for a bet above the €5 maximum while a bonus was active, or for wagering not finished in time (10 days on the Welcome Pack, 3 days on the Weekly Reload).
- Withdrawal limits. Large wins are paid within your VIP level’s caps, from €500 a day at Level 1.
- Account closed or blocked, for example over a suspected duplicate account.
- A game malfunction during a round.
Before you complain, check the rule that was applied. Many disputes end the moment both sides look at the same clause.
Step 1: gather your evidence
Collect everything before you write:
- Screenshots of your balance, the transaction history and any error message, with dates and times.
- References: transaction IDs, withdrawal request numbers and game round IDs.
- The offer and the terms as they were when you played. The terms are version 1.8, last changed on 28 May 2026; save a copy of the offer page on the day you claim a bonus.
- Your messages: chat transcripts and emails with support.
Step 2: contact support
Use the site’s own help channel and keep it factual. Say what happened, when, what you expected and what you want: a payout, a bonus restored, an explanation. Ask for a ticket or reference number and a date by which you will get an answer.
Step 3: make it formal
If support doesn’t fix it, send a written complaint through the same channel or by email. Mark it clearly as a formal complaint and include:
- your username and the email on the account;
- a short timeline with dates;
- the clause of the terms you rely on, or the one they applied;
- your evidence, attached;
- the outcome you’re asking for.
Stay polite and specific. One clear message beats ten angry ones.
Step 4: escalate
This is where it matters who runs the casino. As read on 30 October 2026, the footer and terms of Slimking name neither the operating company nor a gambling licence. That leaves no named regulator or approved dispute service to take a complaint to. The routes that remain:
- Complaint mediation sites. Independent review sites such as AskGamblers and Casino.guru run complaint centres that contact casinos on players’ behalf. They can’t force a payout, but casinos often respond to them.
- Your bank or card provider. If a deposit was taken that you didn’t authorise, or a service wasn’t provided, ask your bank about a dispute or a chargeback. Banks set their own rules and time limits, so ask early.
- Citizens Advice can explain your options as a consumer in the UK.
Before your first deposit
What not to do
- Don’t open a second account to get round a block. It breaks the terms and can cost you both balances.
- Don’t send documents through channels support hasn’t confirmed, or post them publicly.
- Don’t keep playing a disputed balance. Pause, settle the dispute, then decide.
If the dispute is affecting you, or you notice you are gambling to win back what you lost, talk to someone: the National Gambling Helpline is free on 0808 8020 133, day and night.