As customers cotton on to high cost call centres, the ISPs have began to take notice.

Last April BT broadband made all its telephone support services completely free to customers following the lead of O2 and Fasthosts Broadband.

However, there is still an abundance, of usually smaller ISP companies, that charge sky-high rates for technical support.

Customers who find themselves not as tech-savvy may need extra support.

That is why they should pay more attention to the details as a cheap bundle can come with a lot of expensive extras.

BT's managing director, Gavin Patterson, estimated that broadband customers are losing out on a huge £70m a year.

He was quoted as saying:

"There really is no excuse for companies whose prices are either sky-high or verging on the ridiculous."

Many companies will use a variety of tricks to make that little bit more money.

Look out for companies which advertise so-called free support when actually only one of the support numbers is free and at times the rest might cost more than a standard rate.

Always make sure you:

• Read the small print. It seems obvious but so many people seem to miss these little details which could save them a lot of hassle;

• Check if all the support numbers are free;

• Cheaper packages are more likely to have hidden costs so do your research before signing up;

• Also you don't always need to reach for the phone when technical issues arise as a letter or email can be just as efficient;

• Check what line rental service you are calling them from as this will affect the charge. For instance if you have a TalkTalk landline then internet support calls to the company itself are free;

• Check out YouTube, broadband providers such as O2 or BT already have Tech Support video channels.