Hi i Know of two, but not near you, the first is Under Parque SDantiago 3 At the End Of The Shops, The Other is near The Apart Hotel Coral Beach, Hope This Helps.

There are two in Los Cristianos.
1st. Carolinas Supermarket complex. Location. Centre of LC near church, walk up past taxi rank, it is on the left 100mts inside.
2nd. Again stand looking at church, walk up right hand side of church, about 150mts up steep hill. We use this one, a bag 7kilos is 8euros, washed and folded, not ironed. They will iron for extra.