A SINGLE mum was left horrified after her eight-year-old son racked up over £3,000 on her credit card buying XBox game add-ons.

Little Leon Berriedale-Johnson had no idea he was spending his mother Martine’s cash with the extras on Minecraft and Roblox.

The schoolboy spent £3,120 as he played the games online with his pals over a three week period.

Shocked Martine only found out when her credit card statement came through the post.

The mum-of-two said: “I’d put in my card details once for him to buy an add-on for a game for £4.99.

“That was supposed to be a one-off special treat.

“I had no idea that my details had been saved on the system and Leon was still using my card to buy more online.”

On 16 August alone, he made 19 purchases coming to a staggering total of £978.81.

Two days later on 18 August, he made seven more purchases, including one for £199.99.

Full-time mum Martine, 40 - also mum to two-year-old Eddie - added: “When I saw my credit card bill, I went crazy.

“I told him I was selling his Xbox.”

The mum-of-two, of Brighton, said that her credit card bill usually comes to £30 a month, from making Amazon orders and buying takeaways.

She doesn’t know how she’s going to be able to pay this month’s bill - 100 times her usual amount - thanks to Leon’s online splurge.

Martine said: “I’m a single mum and I already struggle to put food on the table.

“But I’m always really careful with my finances.”

Martine said that Leon was very upset when he realised what he had done.

She said: “He had understood that he was buying something but didn’t understand the financial consequences.

“But now I’ve explained it to him and he realises what he did.”

Martine says that Leon wasn’t asked to enter the card’s security number every time he made a purchase online.

She says this is why he was able to rack up such a huge debt without his mum noticing.

Martine contacted Microsoft, who told her that they have a 14-day window for refunds.

Because Leon made most of the purchases between three and four weeks ago, Martine was initially told she was unable to get most of her money back.

But Microsoft has now done a huge u-turn and said they will refund her.

She said: “I’m so pleased to have got my money back, it’s such a relief.

“But I’m going to be making sure that Leon doesn’t do the same thing again.”

A Microsoft spokesman said: “Family settings and tools enable parents to block their children from making online purchases.

“We review all reports, and in cases where we our investigation confirms that purchases were made by a minor without parental permission, we may decide that a one-time refund is appropriate.

“On this occasion, the customer has been fully refunded.“